Message type: E = Error
Message class:  IUEEDPPLOTA - Deregulation: Distribution of Aggregated Payments 
Message number: 281
Message text: Adjustment of payment allocation for lot &1 not possible
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
The items in the current reversal run were not all reversed, or were not
transferred to a reversal distribution lot. The total of the remaining
items in the distribution lot means that the payment assignment cannot
be adjusted.
This situation occurs in the following circumstances, for example:
Payments on account and disbursements are generated by the distribution
lot and the balance of the original distribution lot results in a pay-in
amount.
The items for reversal were not all reversed or were not included in a
reversal distribution lot.
The remaining items in the lot result in a disbursement amount. This
means the payment assignment cannot be adjusted, so that the system
deletes it.
Assign an aggregated outgoing payment on account document to the
distribution key. You may have to select the <ZK>Post Distribution Lot
</> indicator so that the system allows this.
Reverse the distribution lot items that have not yet been reversed, or
transfer them to a reversal distribution lot.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message "IUEEDPPLOTA281 Adjustment of payment allocation for lot &1 not possible" typically occurs in the context of payment processing, particularly when dealing with lot-based transactions in the SAP system. This error indicates that there is an issue with adjusting the payment allocation for a specific lot, which can be due to various reasons. Possible Causes: Lot Status: The lot may be in a status that does not allow for adjustments. For example, if the lot is already closed or has been fully allocated, adjustments may not be permitted. Payment Allocation Issues: There may be discrepancies in the payment allocation that prevent adjustments. This could be due to incorrect or incomplete data.
Configuration Issues: There may be configuration settings in the SAP system that restrict adjustments for certain types of lots or transactions. Data Integrity Issues: There could be issues with the underlying data, such as missing or incorrect entries in related tables. Authorization
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