The syntax for setting properties (the prop or property keywords) as part of a parameter list can only be used in an attribute expression or a new expression. It cannot be used in normal method invocation.
class-id. myClass. 01 X string property. *> this is correct method-id myMethod. invoke self::myMethod2(prop X = "Hello") *> this is incorrect end method. method-id myMethod2. ... end method. end class.