I have an excel macro doing test reports using the QC OTA API.

I have problems with two functions: FindTestSets & FindTestInstances. They run fine the first time but if I do a second run I have the following error:
Run-time error '-2147417848 (80010108)': Method 'FindTestSets' of object 'ITestSetFolder3' Failed

If I restart Excel, the functions run fine at the first run.

Has somebody come accross this problem already?

Thank you