I suspected that it would not support more than one instance but was
never able to get an answer from seagatesoftware.
I have also just found a registry entry for v9 to make it threadsafe,
but it does not match at all with v8.5 that I am using.
I have purchased v11, but am loathe to put in the effort to use this and
find that the problems remain. Much better to shift to something else.
As noted, in real life we are not using multiple instances... however
the crap may well believe that we are. So I was attempting to trap an
AV and recover.. but no such luck... the failure is catastrophic.
I hate com objects marginally more than I hate MSs. :-) But again, I
dont want put in the effort and deploy to several 100 sites and found
out that we have same or other issues.
Robert martin wrote:
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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