Message type: E = Error
Message class:  CNV_DMC_SIN - Messages for s-innovations migration 
Message number: 174
Message text: Special Stock Indicator '&1' for material '&2' not valid for vendor '&3'
When you enter a vendor you also have to enter a valid special stock
indicator.
The migration supports the following special stock indicator for partner
vendor:
'K',,-,,Vendor Consignment
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 CNV_DMC_SIN174 indicates that there is an issue with the special stock indicator for a specific material and vendor combination. This error typically arises during data migration or when performing certain transactions in SAP, particularly in the context of special stock management.
Cause: The error occurs when: The special stock indicator specified (represented by '&1') is not valid for the material (represented by '&2') in the context of the vendor (represented by '&3'). The material may not be set up correctly in the system for the specified special stock indicator. The vendor may not have the necessary configurations or authorizations to handle the specified special stock type.
Solution: To resolve this error, you can take the following steps: Check Material Master Data: Go to the material master record for the material in question and verify the special stock indicators assigned to it. Ensure that the material is set up correctly for the special stock type you are
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