Above error is occurred when the service entry sheet is released for a Service Purchase Order. The reason is the Service Purchase Order contains Planned Delivery Costs. Below are the reasons from SAP Standard to stop Service Entry Sheet.
planned delivery costs are generally not supported in External Services Management and for blanket purchase orders, item category D or B.
In the business function “LOG_MM_MAA_1”, it is possible to process service purchase order items with multiple account assignment and valuated goods receipts only without planned delivery costs. The design of this business function does not allow planned delivery costs for MAA service purchase order items. When posting the goods receipt for MAA purchase order items, the system checks the data to be posted for consistency. If this data is not consistent, the posting of the goods receipt terminates with error message M7 599. This message should prevent data inconsistencies.
Notel: MAA – Multiple Account Assignment