COBCH1651 Operand must be a constant value

A non-constant expression has been specified when a constant is required.

In the following example, the parameter in the attribute specification needs to be a constant, not the variable field s.

$set ilusing"System.Xml.Serialization"

class-id. myClass.
01 s string.
01 i binary-long attribute XmlAttribute(s).
end class.