Message type: E = Error
Message class:  OIJ_ATL - Authority to Load related messages 
Message number: 015
Message text: There is no 1:1 relation between sales order and nomination item
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The SAP error message OIJ_ATL015, which states "There is no 1:1 relation between sales order and nomination item," typically occurs in the context of the SAP Oil and Gas (OIJ) module when there is a mismatch between sales orders and nomination items. This can happen in scenarios where the system expects a direct correlation between these two entities, but the data does not align as expected.
Cause: Data Mismatch: The most common cause of this error is that the sales order and nomination item do not have a direct one-to-one relationship. This could be due to: Multiple sales orders linked to a single nomination item. A single sales order linked to multiple nomination items. Incorrect or incomplete data entry during the creation of sales orders or nominations.
Configuration Issues: There may be configuration settings in the system that dictate how sales orders and nominations should relate to each other. If these settings are not aligned with
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