Hi,
Just check INISTATE command syntax.
ANSYS HELP: INISTATE, Action, Val1, Val2, Val3, Val4, Val5, Val6, Val7, Val8, Val9
Your command:
1. *SET,VORSPANNUNG,0.00067
2. INISTATE,SET,DTYP,EPEL
3. INISTATE,SET,CSYS,-2
4. INISTATE,DEFINE,11,,,,VORSPANNUNG,,,,,
Command at line 4 will define Pre-Strain (EPEL at line 2) for Element have ID = 11.
Check information in Solution Information:

I think this is not the same as your idea, you want to apply Body Pre-Strain not Element, right?