Receiver type determination func. module &: Invalid name for a func. mod.

What causes this issue?

The specified function module for determining the receiver type does
not have a name which is valid for a function module.

System Response

The action was terminated, an event was not triggered.

How to fix this error?

Check whether the name is valid of the function module for determining
the receiver type.

Error message extract from SAP system. Copyright SAP SE.