I cannot open RFEM and RSTAB anymore: nothing happens when double-clicking the icon! Also, no error message is displayed. Restarting the computer did not help, too.


The problem is probably caused by the antivirus software, which prevents the program start. Display the activity log of the antivirus software and define the corresponding exceptions, if necessary.

Furthermore, we recommend you to exclude the following files and folders from the real-time monitoring:

  • Program folders of RFEM or RSTAB:
    C:\Program Files\Dlubal\RFEM 5.xx
    C:\Program Files\Dlubal\RSTAB 8.xx
  • Data folder of RFEM and RSTAB:
  • Folder for temporary data:
    C:\Users\User Name\AppData\Local\Temp\Dlubal (= default settings)
  • License service:

This measure often improves the performance and prevents calculation problems.


Program start RFEM does not start Program fetch Problems when opening the program Virus License request

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RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
RSTAB Main Program
RSTAB 8.xx

Main Program

The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

Price of First License
2,550.00 USD