I have tried to update alternative unit of measure (MARM) for some materials using MM17.
It is working for some unit of measures (Like FT).
But if I try to changes the unit of Measure value for PLB (Counter & Denominator) or DLB it is changing for UNC, if UNC unit of measure is not there for that material then the UNC is getting created.
But according to MM17 functionality I think PLB values should change.
Please check and let me, if you have any solution or any one faced the same issue.