SOPC-Builder does not create <Name>_sim.mpf file

Hi,

I would like to simulate my Project with ModelSim. For that I generate my system with the option "Simulation. Create project simulator files" turned on in the SOPC-Builder.

Some lines of the SOPC-Builder output (don't know if important):
No .sopc_builder configuration file(!)
Building ModelSim Project
Das System kann den angegebenen Pfad nicht finden
HDL Simulation Directory : C:/SVN_Repos_Prakt_FPGA/altera_projects/Project/Project_system_sim 
System generation was successfull.

When I now klick on "Run Simulator" I get the error:

Could not find the simulator file Project_system_sim.mpf in C:/SVN_Repos_Prakt_FPGA/altera_projects/Project/Project_system_sim

Info: If you have not set the HDL Simulator Path (under Tools > Options), do so and regenerate.

This path is set to: C:\Altera\91sp1\modelsim_ase\win32aloem and should be correct.

When I try to start the simulation via NiosII-IDE (Run as --> ModelSim) then ModelSim opens and shows the error:

#  vsim -gui Project_system_sim.mpf #  ** Error: (vsim-19) Failed to access library 'Project_system_sim' at "Project_system_sim".#  No such file or directory. (errno = ENOENT)#  Error loading design

I think this is because the _sim.mpf file was not created by sopc-builder. Any idea why?

I'm using Quartus II 9.1 SP1 and ModelSim 6.5b. I do not have a subscription license.

Thanks!