The 'Balance From' must be different from the 'Balance To'. The Sub-balance Type of field :93A::FROM must be different from the Sub-balance Type of field :93A::TOBA. This check applies to sequence B (Error code(s): E81).
If the message is a cancellation, that is, Function of the Message (field 23G) is CANC, then subsequence A1 (Linkages) must be present in the message, and field :20C::PREV must be present in A1 (Error code(s): E08).
In sequence A, if the total of linked instructions (field :99B::TOSE) is present, then the current instruction number (field :99B::SETT) must be present (Error code(s): E90).