Diagnosis
All the prerequisites for creating, changing or undoing a referencehave been fulfilled and all the checks were successful.
The necessary prerequisites and checks depend on the reference categorychosen. The system checks for the following:

• At least two transactions must be linked.


• The product types and transaction types must match the reference
category. For example, you can only assign product types that belong toproduct category "760" to the reference category "OPT".

• Reference category "KMP" can only be used to net transactions that can
be paid jointly by the payment program for payment requests.

Procedure
The reference is consistent and can be saved.