Answer:
The user-defined cross-section library EigProf.dat on your computer might be missing or corrupted. Please open the "Data Files" tab of the program options and select the "User-Defined Cross‑Section Library" category.
Open the displayed directory and check whether the EigProf.dat file is available. If the file is available, please rename it.
If the path including the file does not correspond to the default path for RFEM 5.xx "C:\ProgramData\Dlubal\RFEM 5.xx\General Data\EigProf.dat," set this default path in Program Options.
