FocusMax STOP on moving focuser for filter change

[Dick Berg]

I'm continuing this thread from here:
http://forums.dc3.com/showthread.php?p=19011#post19011


ACP crashes when switching first time from default Clear filter to (in this case) R filter, and trying to move the focuser. See screen dump, ErrorScreen.png.

At this point there a second instance of FocusMax is (trying to be) starting. See TaskScreen.png.

The code in AcquireSupport (line 5506) where this occurs is in "SetFilterOffset(FiltNum)":

    z = reqOffs - curOffs                                       ' Focus difference between the two
    If z <> 0 Then
        Util.Console.PrintLine "  Focus change of " & z & " steps required"
        If c_haveAF Then                                        ' If AutoFocus turned on, use FocusMax
            Set F = CreateObject("FocusMax.Focuser")
            Util.WaitForMilliseconds 2000                       ' Allow FM to get running
        Else                                                    ' No AF, use Focuser directly
            Set F = CreateObject(c_focuserID)
''-         Trace "  [foffs] Using Focuser driver " & c_focuserID
        End If
        wasLink = F.Link
        F.Link = True

The log file is also attached (see 20090127@210704.log).

I then added some Console.PrintLine statements sprinkled throughout the SetFilterOffset() code, and found that the Focus Max runtime error 13, Type mismatch, occurs while ACP is executing the statement "wasLink = F.Link". It's hard for me to understand what would cause this. It's the first instance of running FocusMax in order to change the focuser position.

Don't know where to go from here, but I sure can't take images with other filters now. Some ideas for "testing" would be appreciated.