The described behavior is correct. I, however, agree that the documentation could be a bit clearer about how implicit type conversion is working. Internally Uniface will always use the period (. ) as decimal separator (and this is regardless of the NLS settings). In case you set V_VAL to "4.08" (in the Proc code you've mentioned) then V_NUMBER will always have the value 4.08 after the implicit type conversion (independent of which NLS locale is used). I think it's better to use explicit type conversion (by using e.g. $number) where necessary instead of relying on the implicit type conversion. I hope this helps. Regards, Daniel Iseli Uniface Technical Support