ModelSim error

Hi!

I get frustrating error many times when i start ModelSim. It says: VHDL Compiler exiting

End then:# ** Error: C:/altera/14.1/modelsim_ase/win32aloem/vcom failed.

Why is this happening?

My solution has been the create a new project, and then it usally work, but takes a lot longer.

Would have been nice to find a fix.

The process has been:

1. Write the code.

2. Start compiling - Non error.

3. Start test bench.

4. Start simulation tool.

Then the error above shows.

Thanks for answers :)