SAP Message B1090 - IDoc type could not be determined for the IDoc

Diagnosis
The IDoc passed to the ALE layer could not be processed. Thespecifications passed in the control record were not correct.
The basic IDoc type (field EDIDC-IDOCTP on the outbound side orEDI_DC-IDOCTYP on the inbound side)has not been specified for thisIDoc.
The attempt to read the basic IDoc type from table EDIDO also failed.No table entry was found for IDoc type &v1& from field DOCTYP.

Procedure
Possible error sources:
- The calling program did not provide values for the fields specifiedabove correctly. Make a note of the transaction in which this erroroccurred and consult your ALE administrator.
- The IDoc type &v1& is not known in your system and must bemaintained.

504230RFFOEDI1: Documentation for IDoc IDCREF01 (EUPEXR)