Idoc exception at target system

Hi

I am sending an Idoc, DELINF.DELVRY05, from ECC system to AII. It's working fine for some Idocs but for some other Idocs it's failing at the traget system. In either case it shows successfully processed in XI. The Receiving interface uses XI adapter and proxy code, which is standard content from SAP

This is the error that I am getting

Error during proxy processing An exception with the type /AIN/CX_IFX_STAND_FAULT_DATA occurred, but was neither handled locally, nor declared in a RAISING clause Application Error

Any inputs ?