Note: this log is created only if such logging was enabled on your system as explained in Logging GN4 system exceptions in a local file.

Where is log of all exceptions?

The log files are created in the current temporary folder and the file name is GN4_[appname]_YYYMMDD.log (for example, GN4_Fred4_20110701.log).

So, if exceptions occur, a log file is created at day, for each used application

Copy the expection file(s), and then attach them to the problem report e-mail.