can not input/browse Nios II Modelsim Path

[Altera_Forum]

Dear all, 

 I tried to run the "hello world" project as "Nios II modelsim", it prompts a dialog, however in the dialog, I can not input the "Modelsim Path", nor can I click the browsing button to browse the Modelsim path, I click the browse button, not response.   How can I slove this problem? or Where can I set the Modelsim path for Nios II?  Thank you very much!

[Altera_Forum]

Have you generated the Modelsim project successfully in the SOPC Builder ? 

There is a Modelsim path in SOPC Builder , under Tools -> Options.