Hi John,

Within the last few weeks, on several occasions, I have had my CCDAP (v3.42.7) program freeze about 1/2 way into the run. It doesn't happen every time. When it does freeze, I get an error message in the log, but not on the screen, that reads, "CM1:Microsoft.visualbasic: object reference not set to an instance of an object" Not only does the program freeze, but the desktop is frozen as well and I have to manually shut down the computer in order to gain control again.

Have you seen this before? Any thoughts? (see attached log)

Thanks for your help,
Kent

ccdap20081021_200207.log (20 KB, 81 downloads) 10,21,08 log

Hi Kent,

This error occured just after a failure inside FocusMax. This may be part of the issue. Take a look at the FocusMax log that corresponds to the time period of the CCDAP3 log and see if it contains any information about the failure. When I have seen this happen before, the link between FocusMax and the focuser has experienced a problem (usually communications) and that prevents the focuser from sending the feedback FocusMax needs to complete the focusing cycle. I would double check all the connection to the Optec focuser and try and manually exercise it to make sure it it working across its full range. HTH ....

Hi Frank,

Good idea. I'll check the connections as well as the focuser.

Thanks for taking the time to help.
Kent