Hi Rohit
It has been some time since I used the Crpe method of accessing Crystal
but my understanding is it is not Thread safe and therefore if you use
it in threads or try running multiple copies of reports it can go bang.
This may be what you are experiencing.
In the end w gave up on Crpe and now use the Com object to run them.
This works better but comes with other issues. I think it is the better
access method though.
Not a log of help i'm afraid :)
Rob Martin
Software Engineer
phone +64 03 377 0495
fax +64 03 377 0496
web www.chreos.com
Wild Software Ltd
Rohit Gupta wrote:
In our real app, the program crashes randomly (regularly for some
users) at the instance that Crpe is used. The app basically
disappears which implies that substantial code and/or stack is corrupted.
In a smaller app that only opens the report to get some stats (it does
not connect to the database), I can get it to crash in the same
fashion predictably.
The sequence of events is open two copies of the app )or one copy of
the app and the CRW designer)
Open any report in the first app (which always assignes ReportName to
blank and does not destroy the crpe component
Open any report in the second app or CRW Designer
Open any report in the first app and its gone with no trace.
In real life the users can not run multiple copies, the app takes care
of that. However the symptoms are identical leading me to believe
that if I can find the cause of the second crash, I can fix the first
one.
Any clues anyone ?
I cant find anything pertinent on google, except for one item where
the author insists that the problem is a secret com object that crpe
launches and if you wait for it to finish and terminate then there are
no crashes. However, delays dont have any effect on my test case.
In the debugger, if I keep doing F7, everything keeps working. But as
soon as I press F8 or F9, it gets an AV because it starts executing in
hyperspace.
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