Update Table not working(O Data)

Hi,

I have created one RFM with importing single parameter and exporting tabular.

For get entity set is working right but when I am trying to put(update) getting error.

1. For update I have written code in update_entity even external break point is not triggering, same worked for get entity.

Get entity Request URI : /sap/opu/odata/sap/ZUSER_DATA_SRV/ZUSERDATASet/?$filter=Uname eq 'P02050607'

Put Operation URI : /sap/opu/odata/sap/ZUSER_DATA_SRV/ZUSERDATASet(Mandt='300',Uname='P02050607')

-Amol S