Can you provide more information, such as the FB version/build, settings on the export action, how is the build being run (manually, scheduled, via FB server?). FWIW we’ve been using the export log action extensively here every day with FB7 while building regression tests and haven’t seen this issue.
We also use this functionality extensively and never had any problems with it. It occured a few day’s ago for the first time and its’ not always the case. It works fine for a few day’s and then it apears with no specific reason what so ever.
When the problem occures and I rerun the action it works just fine. I’ve been thinking that maybe the log file is locked at the moment or something like that.