This sounds like the problem I have... I'm using a private datasession created with the session class. Is there any solution to it?

>>What has happend with preview report in VFP7? There are so many bugs in it that it's almost unusable...
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>>1. Zooming in and out the preview report totally crashes VFP with a Fatal error: Exception code: C0000005, 4 times out of 10. Unbelivable, never happend before...
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>>2. Navigating with next, previous, last, first page in preview report gives the error message: Variable 'tablefield' is not found, very often. But never on the first page. It always appear when you click next or last. Why? If I close the report and preview it again it works almost every time... And if I print the report directly to the printer, no problems at all.
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>>Has anyone else experience the same problem? I have my application installed on about 15 computers and they all have the same problem, so it cannot really be a hardware issue.
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>>The application was created in VFP6, and all preview reports runned just fine there. But after the upgrade to VFP7, it's terrible.
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>I don't remember the details now, but I do remember that clicking the preview pane does something like rerunning the data environment.
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>It also can screw up private data sessions. If your report is set to the default data session, but called from a private data session, it works fine for the first page, but it reverts to data session #1 instead of the DS it was start in when someone clicks on it. Trying to switch data sessions inside it crashes VFP.
>
>Tom