Femap button grayed out in Solid Edge ST10.
This could happen with certain versions of FEMAP and Solid Edge like Femap 11.4.2 and Solid Edge ST10.
It can be resolved as follows:
1. run 'Command Prompt' (as administrator).
2. cd c:\program files\Siemens\Femap114
3. regsvr32 femappaddin.dll
Notes and References
OS Version: 10_1803