Message type: E = Error
Message class:  IUEEDPPLOTA - Deregulation: Distribution of Aggregated Payments 
Message number: 123
Message text: Pymt Adv. Note &1: Document &2: Internal error calling transfer module
An unexpected error occurred when calling function module &SYST-MSGV3&.
Distribution is cancelled.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message "IUEEDPPLOTA123 Pymt Adv. Note &1: Document &2: Internal error calling transfer module" typically indicates an issue related to the payment advice processing in the SAP system. This error can occur during the execution of payment advice documents, and it usually points to a problem with the transfer module that handles the payment advice data. Possible Causes:
Configuration Issues: There may be incorrect or incomplete configuration settings in the payment advice processing module. Data Issues: The document referenced in the error message may contain invalid or inconsistent data that the transfer module cannot process. System Bugs: There could be a bug in the SAP system or the specific version you are using that affects the transfer module. Authorization Issues: The user executing the transaction may not have the necessary authorizations to perform the action. Custom Code: If there are custom enhancements or modifications in the payment processing area, they might be causing the
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