Hi @H.Eray Çelik
That does look weird. At first look, I would wonder about your permissions to this file and to the directories where the underlying files reside. The data file, the path diagram file, the temp files (usually co-located with the path diagram file). Is this behavior specific to this data file? Or does it happen with all data files and all brand new path diagram files?
Ideally, I would have you open a Support case -- See https://www.ibm.com/mysupport/s/?language=en_US
Here is the expected behavior: