SAP Message 0C056 - The second key field of table & is not MSID DOCUMENTATION DiagnosisTable &V1& cannot be defined as message destination for one of thefollowing reasons:The MSID field is not the second key field of the table.The domain assigned to the MSID field does not belong to the same datatype as the CO_MSID domain.The domain assigned to the MSID field does not define the same fieldlength as the CO_MSID domain.The destination is not created.ProcedureCheck the definition of table &V1& in the ABAP/4 Dictionary andcorrect it according to the requirements listed above.