"ISV Code Aborted the Operation" on executing Plugin On Post-Operation of Create Of Quote Details

Hi Experts,

I have registered a plugin on create message of Quote Product (quotedetail).

Now when i try to add a product in the "Quote Product Grid" on quote form system doesn't allow me to do so.

.

 I tried changing the execution order of the plugin to 1000 but still the error persists.

Any suggestions/Solutions on the Error please.

Regards

Prem