1. Some one have turn off the error message in the OBA5 for UKM_PI -008 Error when calling Credit Management: &1 2. also activated /sap/bc/srt/lsc/ in SICF. Now issue resolved, thanks for your help @Vikram Fotani Sir.

Thanks for the clarification @Vikram Fotani Sir. In the BP I am able to simulate the credit check, but somehow it is not triggering in VA01. Let me try by changing the configuration.