Hi Padma,
Sorry for the delay in replying (on holiday).
Yes, I can see the relevant code that is causing your problem. The developer really wants to make sure that you don't transfer any bad data to the feeder system. That makes sense, but I share your view that an individual classification failure shouldn't stop the whole transfer job (only the transfer of that particular Commodity Code or Classification). Perhaps you could appeal that point through an OSS Incident?
Otherwise, and preferably in any case, you should maintain the UoM schema correctly in GTS.
Regards,
Dave