10000735 
Message
In "Weight" column, enter valid weight
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) that is not defined in SAP Business One.
Procedure
On the Contents tab, in the Weight column, enter a weight unit of measure (UoM) that is defined in SAP Business One.
To define the weight UoM:
Choose
Administration 
Setup Inventory Weight UoM 
.In the Weight UoM - Setup window, enter a code, unit name, and weight.
Choose Update and then choose OK.