Error while posting data from Sourcing to PI system

Hi,

We are working on the standard scenario of master agreement integration from Sourcing to ECC via PI.It's a synchronous interface.Sourcing posts the data to PI over HTTP communication and PI sends this data to ECC via RFC connection.

When Sourcing team is pushing data over HTTP connection, its throwing an error "Sourcing was unable to publish Test.Server returned HTTP response code: 500 for url: <>.

However the data is getting received in PI. in PI, sxmb_moni, the sender component, interface and namespace is blank, wherein receiver component, interface and namespace fields are populated with values that of sender.and error is <SAP:Stack>Connection error during RFC communication (function module SIVAPRPR, destination , message )</SAP:Stack> .

Please help.

Thanks,

Ruchi