FM MATERIAL_UNIT_CONVERSION

Hello experts,

I want to use the FM FM MATERIAL_UNIT_CONVERSION.

but SAP SCM Release 4.0 gives me message : Function Module MATERIAL_UNIT_CONVERSION does not exist.

I am getting the same message for FM MD_CONVERT_MATERIAL_UNIT also.

I would like to know why.?

Are there any APO specific FMs.?

Which other FM (APO specific) can I use to convert the base UOM ..?

Thank you