Message type: E = Error
Message class:  CNV20551 - message for package 20551 (company code delete) 
Message number: 699
Message text: MATNR &1 is excluded from deletion;Its associated to active BOM(STLNR) &2
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The SAP error message CNV20551699 indicates that a material (MATNR) cannot be deleted because it is associated with an active Bill of Materials (BOM) (STLNR). This is a common issue when trying to delete materials that are still linked to other objects in the system.
Cause: The error occurs because the material you are trying to delete is still referenced in an active BOM. SAP enforces data integrity, so it prevents the deletion of materials that are still in use. This is to ensure that there are no broken links or inconsistencies in the data.
Solution: To resolve this error, you can follow these steps: Check BOM Associations: Use transaction code CS03 (Display BOM) to check if the material is indeed associated with an active BOM. Enter the material number (MATNR) and check the BOM list to see which BOM it is linked to. Deactivate or Delete the BOM: If the BOM is no longer needed, you can deactivate
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