Hi
Got the solution ..
I just checked ' Check Release strategies' under 'procedure with classification' in config. I checked display logs there - it was showing an error for overall release of PR - I just displayed the long text and found that the system is suggesting to choose CEBAN - GFWRT instead of CEBAN - GSWRT for overall release of PR. CEBAN-GSWRT is being used for item wise release, I made the necessary changes in my configuration and it worked