Dave I haven't recently experienced exactly this with MapBasic though it can
happen with VB6 (etc) in the circumstance you mentioned (" .. possible that
the application might not have closed it properly at it's last attempt.").
After this occurs, it might be useful to see if you can delete or move that
log file (using Windows Explorer), as a test of whether it was actually
locked at the time the OnError failed.
IL Thomas
GeoSciSoft - Perth, Australia
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[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Friday, September 15, 2006 10:46 AM
To: [email protected]
Subject: [MI-L] Error message despite error trap?
Is OnError unable to trap some kind of errors?
I have the following code:
'***************************************************************************
*
' LogMessage: Writes messages to a log file
'
Sub LogMessage
OnError goto ErrorHandler
Open File ApplicationDirectory$() + "MVMMapInfo.LOG" For Append As
#5
Print #5, CurDate() + " " + " " + Time(24) + " " + Message
Close File #5
OnError Goto 0
Exit Sub
ErrorHandler:
Close File #5
TempText = "Error in LogMessage: " & Err() & " " & Error$() &
Message
Print TempText
Call LogDebug(TempText)
OnError goto 0
Exit Sub
End Sub
However, my application occasionally crashes at the line after the OnError
line, i.e.
Open File ApplicationDirectory$() + "MVMMapInfo.LOG" For Append As #5
The error is:
"Cannot access file MVMMapInfo.LOG"
Has anyone seen this happen before where the OnError trap is ignored (or at
least I
assume it is being ignored...)
I don't have the MVMMapInfo.LOG file open at the time the error occurs,
though it is
possible that the application might not have closed it properly at it's last
attempt.
Thanks,
Dave
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