Problem:
If you have recently upgraded your project and started using Crystal Reports for VS 2010 and .Net 4 framework in your project, you might seen this error randomly or continuously after generating some reports.
Cause:
Unlike previous versions of Crystal Reports, Crystal Report Engine is not releasing memory after closing reports.
Solution:
After getting tired of this error, I started diagnosing this issue. I monitored the memory usage and found that memory usage is getting increased even after closing down the reports. So I added some code to restore memory after closing. Here is the addition to my code that solved my problem:
rpt.Close()
rpt.Dispose()
rpt = Nothing
rpt.Dispose()
rpt = Nothing
GC.Collect()
Hope it will solve your problem. Enjoy Coding!
