This issue occurs when attempting to open a CatWalk XT experiment and receiving a warning that the experiment was created with a newer software version—even if the current version is the same one used previously. In some cases, it may incorrectly state that an older version was used but fail to convert the experiment. A typical error message appears as follows:
The version.dat
file in the experiment folder has become corrupted. This file stores only the version metadata, so replacing it is safe and will not affect your actual experiment data.
C:\Users\Public\Documents\Noldus\CatWalk XT\Experiments
version.dat
file and choose Copy.version.dat
file, choose Rename, and change its name to version.dat.old
. Confirm any warning that appears.version.dat
into this folder.Close any open instances of CatWalk XT. Then relaunch the application and open the previously problematic experiment. It should now load successfully.