Access using a 'ZERO' object reference is not possible. (termination: RABAX_STATE) in sap mdg

Hi Everyone,

I have written derivation in MDG derive entity BADI for Vendor master,those derivations are running fine in the case of create /change Vendor but when i am trying to change any existing Vendor or Customer specifically changing AD_POSTAL entity attribute and checking the CR i am getting this error "Access using a 'ZERO' object reference is not possible. (termination: RABAX_STATE)" tried analysing ST22 dump but no luck.

Please provide your valuable suggestion or solution for this.

Thanks,

Aradhana