Dear Imam,
It is the last line where the error is mentioned (the rest of the messages are just warnings):
It looks you are running 64-bit MATLAB/Simulink with a 64-bit FAST S-Function, but trying to use the 32-bit DISCON controller. You need to ensure that the addressing schemes are the same. On line 64 of the ServoDyn input file, you should change “ServoData\DISCON_win32.dll” to “ServoData\DISCON_x64.dll” to use the 64-bit version of the DISCON controller.
Best regards,