Hi Jain ,
Check the Calculation type in the Hedge Strategy config in Effectiveness test. Check the input for the initial NPV value. Based on this you need to perform THM30 or save ur own NPV in VTVBAR to calculate NPV at the inception date of your hedging relationship. then after that calculate the NPv (tpm60) and then check THM80. Also if you double click on the red error in exception, below you can see the error detail.
Regards,
Nikhil