URGENT: Nios II IDE instruction trace not working

Hi,

I am using Nios II IDE instruction trace to see instructions being executed but when i open "trace" view, i am getting following errors

"java.lang.illegalstateexception: no attr_nj_ptf_name"

and

"no connection to nios2-gdb-server"

I tried closing and opening the IDE, and also tried in different PCs to see if its specific to a system. But the problem still persists.

Please help me how to get rid of this problem.

Thanks,

Amjad