SRM PO not getting transfer to ECC Backend after SP07 upgradation

Dear Gurus

We are in Classic scenario SRM 7.2

Recently we have upgraded SP07 in R/3 system ECC 6.6.

Prior SP 7 upgradation SRM PO created against RFx response were getting transferred to ECC backend in Held status with couple of error messag

(which later user use to do further changes in ECC)

Now post SP7 upgradation, we are finding an error in SXMB_MONI as"Error in Receiver Side ABAP Application

not finding much help in debug thorugh SPROXY

can anyone guide on this issue

Thanks & Regards