PIO problem

[Altera_Forum]

hai, 

I am using nios ii .I generated the components using Qsys and works fine.But when i add a single PIO to the existing Qsys whole thing gets collapsed. What can be the reason for this? I am not able to work with the code once i add this PIO?

[Altera_Forum]

What error messages are you receiving?

[Altera_Forum]

I am not getting any error message.The program hangs up after i hit the run.

[Altera_Forum]

You can view this great video on Youtube. 

 https://www.youtube.com/watch?v=hqde3xkwykk

[Altera_Forum]

Did you re-generate BSP? and re-compile software codes (elf)? 

What does the PIO connected to? Did you enable interrupt for the PIO?