10000736 
Message
In "Weight" column, enter unit of measure of less than 3 characters
Diagnosis
You have attempted to add a sales or purchasing document, but on the Contents tab, in the Weight column, you have entered a weight unit of measure (UoM) of more than three characters.
Procedure
On the Contents tab, in the Weight column, enter a weight unit of measure (UoM) that is less than three characters.