Modifying Function Parameters › Defining Function Parameters › Defining the Parameter’s Usage and Role › Parameter Usage Restrictions

Parameter Usage Restrictions

When the function option Duplicate Parameters is set as Y, a parameter field can appear on a function’s parameter interface. This can occur anytime from none (zero) to numerous times with any parameter usage.

However, when the function option Duplicate Parameters is set as N, the following situation applies:

• For a given function, each parameter field must be unique. In other words, a field can only appear once regardless of usage (I,O,B, or N). The exception to this situation is when a field can be defined separately once for input and once for output, so it can appear two times.

Note: An attempted violation of this restriction and exception causes the error message Y2V0214–Parameter is duplicate to be sent.