How to simulate if the compiler told me #error loading design

[mostafa fatouh]

i wrote a code on vhdl it compiled successfully but i can not simulate it 

when i go to ( simulate << start simulation  ) 

modelsim tells me  that #error loading design

[srujan]

When you look at the transcript you will get to where the code run successfully and where did it get the problem.  From this you could figure out.

[jessi mallika]

ya same problem here.. 

:"Please go to http://www.model.com and download an updated copy of the ModelSim PE Student Edition."

showing this message what to do