Hi Ludek,
I have done a few more tests.
First I have set the ConnectionDirectoryPath back to value C:\. But this had no effect. I could still open the report in the viewer without any problems.
Then I have deleted the ConnectionDirectoryPath. This had also no effect. The report could be opened.
So I think, the ConnectionDirectoryPath is not relevant for the problem.
After that I did the same with the ReportDirectoryPath.
Setting this key to C:\ causes the error as well as deletion of this key.
This key must obviously refer to an existing directory, because a value of C:\ fails.
I suppose, if the key does not exist the Load-method uses a hard-coded path on drive C:\, as default, because on my developer system this key is missing. It has a C:\ drive and I can open the reports without problems.
Do you know the usage of the ConnectionDirectoryPath or the ReportDirectoryPath?
Regards
Thomas