Cannot add or update document; specify a UoM code

Hi,

Need some help urgently.

I am facing an error "Cannot add or update document; specify a UoM code" when adding Sales order to SAP via Di-api.

Client has SAP 9 32 bit pl-12.

My development environment has

SAP 9 32 bit pl-00.

I am currently unable to fetch the UoM associated to Item via getbykey() function nor can assign any pre-defined value at sales order line level cause at debugging shows it is only readable field.

Will Pl-upgradation at my development environment help me in any way or there exists any other solution.

Please give some advice.

Thanks and Regards,

Saurav