David's Astronomy Pages Notes - Session 818 (2020-10-09)

Notes (S817)

Notes Main

Home Page

Notes (S819)

	Session Aims & Highlights
	- Observing Result  - Night Summary Plot  - Session Event Log
	Operational Issues
	- Critical Issues (0),  Major Issues (1),  Minor Issues (6),  Continuous Improvement (10)
	Images from 2020-10-09 >>
	Investigation - Frozen job queue following start of autoguide operations

Session Aims & Highlights (2020-10-09)

Main aims

1. Autoguide Monitoring / Charts. Check that autoguide monitoring / charts are now working correctly following revision to PHD2 Messaging Routines made in AstroMain 3.30.3
2. Targets.  Acquire images of a selection of deep sky targets
3. Bug fixes.  Check that bugs discovered in last session in AstroMain 3.30.3 have been fixed.

Equipment & Software

• 12" LX200 and ST-10XME
• 80mm APO and ZWO ASI 178MC
• CCDApp2, TheSky6, CCDSoft5, PHD2,  DeviceHub 4.6.1.11, UPB 1.5 
• Pegasus UPB & Motor Focus, TCF-S
• SharpCap 3.2, PHD2  2.6.9
   
• AstroMain 3.30.4,  AstroGuard 1.4.5,   AstroPlan 1.16.5,  AstroShCap 1.2.26, AstroVOE 1.4, AstroProtect 1.4.1
  (AstroWeather 1.10.13, AstroAllSky 3.6)

Highlights

• Autoguide Monitoring / Charts. The problem that was caused autoguide monitoring to believe there was some 22 times more guidestep events than there actually were is confirmed to be fixed.

Lowlights

•   Job Queue / AutoGuiding. Jobe Queue frooze shortly after starting PHD2 Guiding for several targets during the session, leading to Obs.Overseer making the Observatory Safe and requiring manual interventation to restart/resumed the session.

Summary Plots & Logs

Observing Plan

Observing Result

Dome & Scope Slewing Performance

Slew/Centering Performance

Guiding Performance

Sky Conditions (Locate Frames)

Night Sky Summary Plot Top axis: Sky Brightness at Zenith (in ADU/s) Lefthand axis: Local Time (hh LT). Righthand axis: Sun Altitude (degs)

Pre-Session Weather Forecast (API data from darksky.net) Pre-Session Weather forecast showed initial wet and cloudy conditions (64-93% cloud cover), gradually improving to become failry clear from 01:00 onwards (15-23% cloud cover) Wind (13-16 mph), Minimum temperature 12°C by dawn In the event conditions were initial showery with rain at 19:00 and 21:30. Sky clear and dry between 21:40 and  01:00 allowing observing session to take place. Cloud developed rapidly at 01:10 and ended the night's observing. Rain from 03:00 to 04:40.

Session Event Log

Time     Event Detail 21:59:12 Session Monitoring AutoStart monitoring for Live Session opportunity starting between 21:59 & 05:38 21:59:14   AutoStart Delayed Session delayed due to cloud 21:59:29 Session AutoStarting Session autostarting (21:59) 21:59:59 Session Created Live Session Created (2020-10-09 S00818, ImageSaveNum: 818001) 22:00:02   Scope Switched On Telescope Power has been switched on via UPB Powerbox. 22:01:51   Services Started Observatory Services started 22:02:00 Observatory (Auto) Observatory placed in Fully-Automated Mode 22:02:04 Session Pending Session pending (2020-10-09) 22:02:06 Session Initiating Session initiating (2020-10-09) 22:02:08   Plan Requested Observing Plan requested from AstroPlan (1.16.5) 22:02:34   Plan Loaded Observing Plan loaded to queue (2020-10-09 V1 BEST PLAN, Plan ID: 553) 22:02:46   Camera1 Connected SBIG Camera Connected (set point -20°C) 22:02:52   Telescope Connected Telescope Connected (TheSky6) 22:03:02 Session Equilibration Session ready for dome & camera equilibration 22:05:50   Dome Opened Dome opened (opening time 45s) 22:05:53   Equilibration Started Dome Equilibration started 22:10:05   Equilibration Ended Dome Equilibration ended (4.3 mins total) 22:10:07 Session Running Session running 22:10:09   Queue Started Observing Queue started (26 targets selected) 22:11:19       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 22:15:50       Focusing Completed Foc1 AutoFocus Completed (Profile No 1) 22:18:30       Focusing Completed Foc1 AutoFocus Completed (Profile No 1) 22:18:32       Focusing Started-Foc2 Foc2 Focusing Started (Secondary Scope, using ShCap) 22:20:55       Focusing Completed Foc2 AutoFocus Completed (Profile No 2, wide) 22:22:56       Focusing Completed Foc2 AutoFocus Completed (Profile No 2) 22:23:14       Focusing Checked Foc2 Focusing Check Succeeded 22:23:17     Target Started (1/26) Target started (1/26, 61 Cyg) 22:36:32   Dome Closed Dome closed (closing time 50s) 22:37:33   Dome Parked Dome moved to Az 90 deg (Park Position) 22:41:00 User Intervention User intervention to unlock frozen job queue and restart 22:41:02 Observatory (Manual) Observatory placed in Manual Mode 22:42:20 Observatory (Auto) Observatory placed in Fully-Automated Mode 22:42:23 Session Pending Session pending (2020-10-09) 22:42:25 Session Initiating Session initiating (2020-10-09) 22:42:26   Camera1 Connected SBIG Camera Connected (set point -20°C) 22:42:27   Plan Loaded Observing Plan loaded to queue (2020-10-09 V1 ACTIVE PLAN S818, Plan ID: 553) 22:42:31   Telescope Connected Telescope Connected (TheSky6) 22:42:41 Session Equilibration Session ready for dome & camera equilibration 22:43:28   Dome Opened Dome opened (opening time 47s) 22:43:31   Equilibration Started Dome Equilibration started 22:43:33   Equilibration Skipped Dome Equilibration skipped by user 22:43:35 Session Running Session running 22:43:37   Queue Started Observing Queue started (25 targets selected) 22:43:39     Target Started (2/26) Target started (2/26, GCVS SS Cyg) 22:49:19     Target Completed Target partially completed (2/26, GCVS SS Cyg) 22:49:21     Target Started (3/26) Target started (3/26, NGC 6978) 22:52:00       Focusing Failed Foc1 Focusing Failed - star is lost (TCF-S) 23:09:34     Target Completed Target completed (3/26, NGC 6978) 23:09:36     Target Started (4/26) Target started (4/26, UGC 12304) 23:11:07       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 23:13:45       Focusing Completed Foc1 AutoFocus Completed (Profile No 3) 23:29:14     Target Completed Target completed (4/26, UGC 12304) 23:29:17     Target Started (5/26) Target started (5/26, NGC 7722) 23:31:07       Focusing Failed Foc1 Focusing Failed - star is lost (TCF-S) 23:43:23     Target Completed Target completed (5/26, NGC 7722) 23:46:27     Target Started (6/26) Target started (6/26, NGC 514) 23:58:56   Dome Closed Dome closed (closing time 46s) 23:59:28   Dome Parked Dome moved to Az 90 deg (Park Position) 23:59:29 User Intervention User intervention to unlock frozen job queue and restart 23:59:30 Observatory (Manual) Observatory placed in Manual Mode 23:59:42 Observatory (Auto) Observatory placed in Fully-Automated Mode 23:59:46 Session Pending Session pending (2020-10-09) 23:59:48 Session Initiating Session initiating (2020-10-09) 23:59:49   Camera1 Connected SBIG Camera Connected (set point -20°C) 23:59:50   Plan Loaded Observing Plan loaded to queue (2020-10-09 V1 ACTIVE PLAN S818, Plan ID: 553) 23:59:54   Telescope Connected Telescope Connected (TheSky6) 00:00:04 Session Equilibration Session ready for dome & camera equilibration 00:00:51   Dome Opened Dome opened (opening time 47s) 00:00:54   Equilibration Started Dome Equilibration started 00:00:56   Equilibration Skipped Dome Equilibration skipped by user 00:00:58 Session Running Session running 00:01:00   Queue Started Observing Queue started (21 targets selected) 00:01:02     Target Started (6/26) Target started (6/26, NGC 514) 00:08:50 User Intervention User intervention to unlock frozen job queue and restart 00:08:52     Target Failed Target failed due to aborted (6/26, NGC 514) 00:08:54   Queue Aborted Job Queue aborted 00:08:56 Observatory (Manual) Observatory placed in Manual Mode 00:09:08 Observatory (Auto) Observatory placed in Fully-Automated Mode 00:09:10 Session Pending Session pending (2020-10-09) 00:09:11   Camera1 Connected SBIG Camera Connected (set point -20°C) 00:09:12 Session Initiating Session initiating (2020-10-09) 00:09:14   Plan Loaded Observing Plan loaded to queue (2020-10-09 V1 ACTIVE PLAN S818, Plan ID: 553) 00:09:16   Telescope Connected Telescope Connected (TheSky6) 00:09:27 Session Equilibration Session ready for dome & camera equilibration 00:09:30   Equilibration Started Dome Equilibration started 00:09:32   Equilibration Skipped Dome Equilibration skipped by user 00:09:34 Session Running Session running 00:09:36   Queue Started Observing Queue started (20 targets selected) 00:09:38     Target Started (7/26) Target started (7/26, UGC 12423) 00:11:08       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 00:14:06       Focusing Completed Foc1 AutoFocus Completed (Profile No 4) 00:30:12     Target Completed Target completed (7/26, UGC 12423) 00:30:14     Target Started (8/26) Target started (8/26, WDS GRB 34) 00:32:55       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 00:35:49       Focusing Completed Foc1 AutoFocus Completed (Profile No 5) 00:37:22     Target Completed Target completed (8/26, WDS GRB 34) 00:37:24     Target Started (9/26) Target started (9/26, GCVS RX And) 00:39:08       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 00:41:46       Focusing Completed Foc1 AutoFocus Completed (Profile No 6) 00:44:18     Target Completed Target completed (9/26, GCVS RX And) 00:44:20     Target Started (10/26) Target started (10/26, UGC 1178) 00:46:14       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 00:49:24       Focusing Completed Foc1 AutoFocus Completed (Profile No 7) 01:05:07     Target Completed Target completed (10/26, UGC 1178) 01:05:09     Target Started (11/26) Target started (11/26, GCVS HH And) 01:10:24   SoftSuspend Called Soft Suspend is called due to Deteriorating Conditions (too few stars) 01:11:02 User Intervention User intervention to unlock frozen job queue and restart 01:11:04     Target Failed Target failed due to aborted (11/26, GCVS HH And) 01:11:06   Queue Aborted Job Queue aborted 01:11:19 Observatory (Auto) Observatory placed in Fully-Automated Mode 01:11:21 Session Pending Session pending (2020-10-09) 01:11:22   Camera1 Connected SBIG Camera Connected (set point -20°C) 01:11:23 Session Initiating Session initiating (2020-10-09) 01:11:25   Plan Loaded Observing Plan loaded to queue (2020-10-09 V1 ACTIVE PLAN S818, Plan ID: 553) 01:11:27   Telescope Connected Telescope Connected (TheSky6) 01:11:38 Session Equilibration Session ready for dome & camera equilibration 01:11:41   Equilibration Started Dome Equilibration started 01:11:43   Equilibration Skipped Dome Equilibration skipped by user 01:11:45 Session Running Session running 01:11:47   Queue Started Observing Queue started (16 targets selected) 01:11:49     Target Started (11/26) Target started (11/26, GCVS HH And) 01:15:30 User Intervention User intervention to unlock frozen job queue and restart 01:15:31     Target Aborted (11/26) Target aborted (11/26, GCVS HH And) due to User Intervention 01:15:33   Queue Paused Queue paused for SoftSuspend 01:15:35 Session Suspended Session suspended 01:16:25   Dome Closed Dome closed (closing time 50s) 01:28:44     Target Cancelled Target cancelled (12/26, M31_AT2020vak) due to cloud 01:43:20     Target Cancelled Target cancelled (13/26, GCVS U And) due to cloud 02:04:12     Target Cancelled Target cancelled (14/26, NGC 596) due to cloud 02:26:34     Target Cancelled Target cancelled (15/26, NGC 615) due to cloud 02:48:56     Target Cancelled Target cancelled (16/26, NGC 772) due to cloud 03:05:45   Camera1 SetPoint SBIG Camera Set Point Temperature Updated (new set point -15°C) 03:11:18     Target Cancelled Target cancelled (17/26, NGC 779) due to rain 03:33:40     Target Cancelled Target cancelled (18/26, UGCA 25) due to rain 03:46:18     Target Cancelled Target cancelled (19/26, GCVS DY Per) due to cloud 03:55:14     Target Cancelled Target cancelled (20/26, GCVS GK Per) due to rain 04:10:51     Target Cancelled Target cancelled (21/26, UGC 6930) due to rain 04:32:13     Target Cancelled Target cancelled (22/26, UGCA 105) due to rain 05:13:54     Target Cancelled Target cancelled (23/26, NGC 2158) due to cloud 05:26:35     Target Cancelled Target cancelled (24/26, Nova AT2020bfc) due to cloud 05:46:46     Target Cancelled Target cancelled (25/26, Scholz's Star) due to cloud 06:18:08     Target Cancelled Target cancelled (26/26, NGC 2782) due to cloud 06:18:13   Queue Completed Job Queue completed 06:18:18 Session Closing Session closing 06:18:22   Dome Closed Dome already closed (closed at 01:16, closing time 50s) 06:19:38   Dome Parked Dome parked (parking time 74s), Az: 90.0 deg 06:20:28   Telescope Parked Telescope parked (parking time 44s) 06:20:58   Telescope Switched Off Telescope Power has been switched off via UPB Powerbox. 06:21:49   Services Stopped Night Services stopped 06:21:51 Session Housekeeping Housekeeping Started (Cleanup FITS, Create Fits Summary, Transfer Files) 06:21:58 Session Finished Session Finished

Session Alerts

Time     Alert Detail -- No Alerts                --

Back to Top

Operational Issues (2020-10-09 S818)

• Critical Issues (0)
• Major Issues (1)
• Minor Issues (6)
• Continuous Improvement (10)

[ Prev | Next ]

Critical Issues

• None

Major Issues

• Job Queue frooze around end of centering / start of autoguiding of Target 1/26 (61 Cyg),  leading to Obs.Overseer making the observatory safe whilst autoguiding/monitoring continued with multiple 'star lost' messages reported.   Issue was Investigated  (see Investigation - Frozen job queue following start of autoguide operations)  and fixed in AstroMain 3.30.5 by making PHD2 Listening Loop send events to an Event queue (qEvent) instead of an overwrittable LastEvent variable and editing PHD2.GetEvent read from this queue, ensuring that 'Do While bGuideMethodFinished = false' loop processes each Event received without missing any.
  Fixed 2020-10-10 (AstroMain 3.30.5).

Minor Issues

• Multiple "Star ...    Fail      Star lost - low HFD"  messages unnecessary reported.   This occurred after Dome was automatically closed to make the observatory safe, after Obs.Overseer detected that Job Queue had been frozen for 10 minutes (being investigated separately) . Message is produced in the StartPHD2Guiding routine.
  Fixed 2020-10-10 (AstroMain 3.30.5).
   
• General Alerts table on Current/Latest Session Web Page is stuck on '2020-10-05' . Review shows that the General.Alerts.htm file is being created and saved to 'Live' folder but is evidently not getting uploaded to website.  Checking current session webpage again shows the current version of file (2020-10-10) is now displaying ok. Not sure if 'touching' / opening the file in live folder was enough to trigger AstroPlan as recognising the file as a new one and uploaded it.  Eventually fixed by ensuring that SetFlagChanged("Alert", 0) is called when after old General Session Alerts are cleared.
  Fixed 2020-10-12 (AstroMain 3.30.6).
   
• Unable to see latest guide summary table on Latest/Current Session Web Page (only first 2 targets can be seen).
  Data in live folder is more up to date, suggesting a file date issue or some other problem that stops AstroPlan from uploading the file to web site.  Checking current session webpage again shows the current version of the file had at some point been uploaded to website.
  Resolved itself 2020-10-09  (AstroPlan/Website).
    
• 'N' value (no. of guide frames) shown on AutoGuiding Charts seems to be one less than the value tabulated in guidesumm table and one less than the number of points drawn on Error graphs.  Problem seems to be caused by GuidingChart.AddGuideStep(G) routine being called before the UpdateGuideStats(G) routine.  The order in which routines are called has been swapped but it's uncertain if there are any unwanted side effects of doing this.
  Fixed 2020-10-10 (AstroMain 3.30.5).
   
• Circles on X/Y Error Graphs on Guiding Chart are labelled with  ' (minutes), but should be labelled with " (seconds).
  Fixed 2020-10-12 (AstroMain 3.30.6).
   
• Scope.GetRaDec producing exception message (Get RightAscension) to log file immediately after Connecting Scope. Issue happens with both Live Hardware and Simulator. It is presumed to be due to a call to Scope.GetRaDec.   Issue fixed so that Exception in GetRaDec are not logged within first 30s of Telescope connection.
  Fixed 2020-10-13 (AstroMain 3.30.6).
   
• PHD2.ParseResponse is failing to extract the entire string, when it contains a comma.   When using  ParseEvent(Message, "Msg", AlertMessage)  on a Message containing "Msg":" "For best results, use a Dark Library or a Bad-pixel Map while guiding",   the resulting AlertMessage ( "For best results ") only contains characters up to the first comma, rather than the end of the string.
    Fixed 2020-10-13 (AstroMain 3.30.6).

Continuous Improvement

• Fix long-standing minor issue whereby log messages are be recorded showing out of memory notices.  ClearStarGraph & DrawTimeSeriesGraph routines are not currently used. 
  22:49:20.33 | EXCEPTION     ClearStarGraph         Fail | Out of memory.
22:49:20.33 | EXCEPTION     DrawTimeSeriesGraph    Fail | CopyBitmap to PanelGraph: Out of memory
ClearStarGraph and DrawTimeSeriesGraphs routines are called from classOB.GotoTarget
  Code modified so that routines are exited if associated form (frmStar or  frmTimeSeries) hasn't  been opened
  2020-10-13 (AstroMain 3.30.6)
   
• After loosing a server connection the VOE messages  'no connection could be made ..." to be shorterned to just a single line & once connection is made the outage time should be reported.
Done 2020-10-10 (AstroVOE 1.4.1)  
   
• Although there were at 2 incidences where Obs.Manager detected that job queue had frozen and made the observatory safe, no alerts / events were recorded on the database.   These are now recorded as alerts in the database.
  Done 2020-10-10 (AstroMain 3.30.5).
   
• Try again to stop CCDSoft application from persistently keep coming to the front whilst analysing the _Reduced folder.  TThere have been attempts to fix this in the past but without success. Tracing execution shows that it is the call to CCDSoft's  Image.InsertWCS method that brings the CCDSoft application to the front.  There is no way to change/alter CCDSoft's behaviour.   Item to be Closed
  Unable to make requested improvement  (AstroMain / CCDSoft)  
   
• Illustrate Operational Issues Web Section with suitable tags/labels to highlight the different issues.Idea came from seeing lists of GitHub issues.
  Done, but still cascading back to older Notes  (Website) 
   
• Obs.Manager to add 'clear again' Alerts for earlier inactive AllSky/Synopsis and inactive Cloud Sensor Alerts.  At 10:45  General Session alerts where generated for AllSky/Synopsis and CloudSensor' being inactive for more than 5 minutes.  Green alerts need to be sent out when data is active again.  
  Done 2020-10-10 (AstroMain 3.30.5).
   
• Labels to Point on GuideSummCharts to be placed closer to the circular Data Point Symbols Circles.   Label offset from Data Point decreased from x+7 pixels to x+4 pixels
  Done 2020-10-13 (AstroMain 3.30.6).
   
• Add button and functionality to AstroMain Observing and AstroPlan Target to fill in Object Type by looking up Target's object information in TheSky6. New function ( GetObjectType) written and added to AstroMain and AstroPlan  that are called from 'ew '<<'  button (btnFillObjectType)
  Fixed 2020-10-13 (AstroMain 3.30.6 & AstroPlan 1.16.6).
   
• Reduce Equilibration Time if time is already past the normal starting time (-12 deg SunAlt) and Near Zenith focusing is scheduled.  This can add an extra 5 minutes of observing time to the session (all things equal). Equilibration isn't particularly compromised as later starting will allow more time for observatory to cool and near zenith focusing takes up to 12 mins in any case, so the scope and camera are well cooled by time first target is acquired.  When starting earlier in the evening, and there is time available whilst waiting for Sun Alt to drop below -12 deg then extra 5 minutes of equilibration has no cost and thus only has upside. During summer different timings / start time apply.  New Feature has been added.  Dome Equilibration (if running) is halted when sun altitude descends below -12 deg.
  Done 2020-10-13 (AstroMain 3.30.6).
   
• Show ShCap version number next to SharpCap version number on AstroLaunch / Observatory Tab.
  Done 2020-10-13  (AstroLaunch 1.4.4).

[ Prev | Next ]

Back to Top

Investigation - Frozen job queue following start of autoguide operations

Issue
Job Queue frooze around end of centering / start of autoguiding of Target 1/26 (61 Cyg)  leading to Obs.Overseer making the observatory safe whilst autoguiding/monitoring continued with multiple 'star lost' messages reported.  

Description
Last IamAlive message was from ExecuteTarget/CenterTarget/ at 22:25.  Abort Target, Abort Job wouldn't work. Manually aborted PHD2 guiding and moved AstroMain to Manual and manually used the 'Kill Job' backdoor button to kill the Job Queue task. Restarted Automated mode without closing the program (a calculated risk / experiment).   Target 2/26 (SS Cyg) and Target 3/26 (NGC 6978) successfully acquired.

The last few log messages , would seem to confirm that Centering had finished and operations had moved onto to AutoGuiding in preparation for focusing/imaging.
22:25:08.65 | 61 Cyg                Continue       Ok   | IamAlive: CentreTarget
22:25:08.66 | 61 Cyg                CenterTarget   Ok   | IamAlive: ExecuteTarget
22:25:08.66 | 61 Cyg                Session.Slew   Info | Starting SaveSlewFileToLiveFolder
22:25:09.23 | Observatory           PHD2           Info | Connect PHD2 Devices
22:25:09.48 | Observatory Services  Get GuideRate  Ok   | 0.003763944 (0.90)

The same issue happened with Target 6/26 (NGC 514), where job queue again stopped at the same point. Again the same manual method was used to resume session.

The PHD2 Graph suggests that problem happened before Dec Drift Direction / Required Dec Guide Direction was determined and set. 

The same issue happened again when Target 6/26 (NGC 514) was restarted., and then again later on with Target 11/26 (HH And)  These times the job queue was aborted using 'Abort Job' button before the Obs.Overseer intervened to make the observatory safe (allowing a faster restart).

Analysis
Hypothesis is that Job Executor calls 'Guider.StartGuider, but execution doesn't return for some reason and/or some finished flag isn't set or not read..   Multiple 'Star ...    Fail      Star lost - low HFD"  messages more than 10 mins after Job Queue is believed to have frozen indicate that the 'Guider.StartPHD2Guiding' is still running.  Report records shows that the scope hasn't exit the routine and  started the Focusing stage. Within StartPHD2Guiding routine the execution enters a Do While bGuideMethodFinished = false' loop where it appears that bGuideMethodFinished is never set to True and the execution remains locked in the loop giveing the outside appearance that the Job Queue has frozen. The only conditions in which bGuideMethodFinished is set to True are if a SettleDone event is received or an error Response is received.  

Examining  the PHD2 Message Log messages associated with 61 Cyg  the Guide request was made at 22:25:10
    {"method": "guide", "params": [{"pixels": 2.0, "time": 6, "timeout": 10}, false], "id": 36}
for which there was a 'SettleDoneEvent'  27s later at 22:25:37.48
   {"Event":"SettleDone","Timestamp":1602278737.469,"Host":"LAPTOP9_CHILL","Inst":1,"Status":0,"TotalFrames":4,"DroppedFrames":0}
however it was superseded by a following "GuideStep" event just  30ms later at 22:25:37.51

It is supposed that due to unfortunate timing issue (Guide Steps are typically 2600ms apart) the LastEvent variable wih SettleDone event was overwritten before if had been read, after which there was no way for the loop to be exited.

Fix
A fix has been attempted in AstroMain 3.30.5 by making PHD2 Listening Loop send events to an Event queue (qEvent) instead of an overwrittable LastEvent variable and editing PHD2.GetEvent read from this queue, ensuring that 'Do While bGuideMethodFinished = false' loop processes each Event received without missing any. As a further backup a timeout of  2 x  TimeOut of the Guide Method is used as additional condition to exit out of the StartPHD2Guiding routine.

After monitoring later sessions it was concluded that the fix had been successful.

Fixed 2020-10-10 (AstroMain 3.30.5).

Back to Top