First I'd like you to have a look at the document SAP Crystal Reports Engine in a Multi-Threaded Visual Studio Application. Next make sure you are using SP 10 for CRVS.
Next, you will have to tell me what database you are using, connection type and if MS SQL, what client?
BTW.; these being community forums, you may get an answer, you may not. It may be timely, or not. If you are looking for a faster response, there is the option of creating a phone incident here:
Crystal Single Case Technical Support - SAP Business Objects US Online Store | SAP Online Store
One more KBA to look at:
1403341 - How to export reports in multiple threads using the Crystal Reports .NET RAS SDK
- Ludek
Senior Support Engineer AGS Product Support, Global Support Center Canada
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Message was edited by: Ludek Uher