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Question about Technical Questions What is an err.log, and where do I find it?


The file err.log stores important status outputs of the program. Errors occurring during operation will also be recorded there. That is why this error log often greatly helps the programmers to find out about program errors.


Depending on the Windows version you are using, you will find the err.log in the following folder:

  • Old Installer (up to and including 1.230):
    C:\Program Files\Catan\Catan - Cities and Knights\Client\
    or alternatively in C:\Program Files (x86)\
  • New installer (1.231 or newer):
    • Windows XP:
      C:\Documents and Settings\Username\Applicatan Data\CatanSuR\Client\
    • Windows Vista / Windows 7:

To access this folder, open the Windows Explorer via the start menu (Start / (All) Programs / Accessories) or by simultaneously pressing Win-E (the Windows key on the lower left of your keyboard together with the letter E).

If the file extensions are hidden for known file types (standard setting), the file is simply called “err” (without “.log”).

The file is continued every time you start the program. If you completely uninstall and then reinstall the program, an empty err.log file will be created in the above-mentioned folder.

Mac OS X:

Please switch to your home directory by pressing Cmd-Shift-H in the Finder. In it you will find your personal “Applications” folder containing the “Catan” folder, which, in turn, contains the ”Catan - Cities & Knights” application icon.

Right-click on this icon (or click on it while holding down the Ctrl key) and select “Show package content.”

From there, go to /Contents/Resources/CSR/Client, which is where the err.log is located.

During the respective program run on Windows or Mac OS X, the err.log file will be filled with status messages and, if applicable, with error messages. Please e-mail the file to our service team for closer examination (if possible, compressed - e.g., with 7-Zip (free download)).