Hi,

I tried everything I found on the Internet to get rid of random C0000005 GPF
in VFP7 applications while print preview. Everything worked well with VFP6.

Today I managed to find an environment which allows me to
reproduce the error after about 2 to 15 print previews after
each start of my application.

The error does not occur in the development environment just in
an .exe application (with equal table content).

It occurs more often with W2K (SP2 or new SP3) but on completly
different platforms at my customers' sites.
VFP7 SP1

It is not neccessary to zoom.



What didn't help:

- removing printer information (tag, tag2, expr)

- using different default printer drivers (tried about 10)

- recompiling the whole application

- recompiling the report

- reindexing all tables

- packing all tables (Stonefield and Microsoft tools)

- using different runtimes of different languages (English, German)

- removing resource files (SET RESOURCE OFF within app)

- changing memory environment (SYS(3050))

- different video cards on different systems

- Switching off numeric co-processor

- using _fpreset() after each do report

Due to the possibilty to reproduce the error with one environment
(1 report, table contents) I found out:


- the error depends on table data, but is not caused by
corrupt data. Changing the data can remove the error for
some time: e.g. deleting a record and adding the same record again
(in a lookup table used by an external method/function).

- the error depends on the report. Some reports run more often into
the error

- I managed to cure one report by using two separate fields instead
of an expression like datafield+"string"+userdefinedfunction().
It was not possible to get another quite similiar report
working without random errors with the same method.

It seems to be a problem within report preview which depends on
external data (internal timing of memory usage?).

I would be happy to receive any suggestion what I can try.
I read already all postings on UT and it seems that others
have similiar problems with VFP 7.

Does anybody know whether a SP2 is scheduled for VFP7.

Thanks

Andreas