When user try to complete IC transaction following error message appearing.
Microsoft Dynamics NAV
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The field Unit of Measure Code of table Sales Line contains a value (NOS) that cannot be found in the related table (Item Unit of Measure).
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OK
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Even though all the cross reference are correct from item side & company side above error appearing.
This is occurred due to UOM conversion error in another transaction.
To overcome this issue. User have to filter required transaction number (IC transaction Number) from complete line transaction action.
Then user can process required transaction without issue