f$Undef (f$Undef)

f$Undef (f$Undef)

Set a parameter to UNDEF state.

Please note: the parameter name is usually given as string constants, i.e. in quotation marks. If a string parameter is entered - like in the syntax description - then the value of the parameter entered is considered as the parameter name (as long as it is a string).

If all members of an indexed parameter are to be set to UNDEF, then the index 0 in square parentheses [0] is to be added to the parameter name.