Third party purchase unit of measure issue.

Hi Friend,

I have created sales order for third party process unit of measure in sales order is in Meter  qty is 3.7 mater.

But PR & PO id created in the unit of measure Piece i.e. 3.7 pieces.

GR is already done for qty 3 pieces. Now when user is trying to do GR for qty 0.7 pieces we are getting error message serial number management allows only whole number.

How can I do GR for this. Also I want to know what setting I need to do to have PO in unit of measure M i.e. Mater.

Thanks,

Kiran