log.SaveResultsAs(path,2) gives error

I use log.SaveResultsAs (path, 2) in order to save the logresults to the local disk (so I can package and e-mail them).

This has worked for years with testcomplete 7 and 9. Since we moved to testcomplete 11 I get the error "Can't save" in the log.

This only seems to happen when the log contans an error or warning.

Is this a known issue? Is there any way around it?