System Functions (System Information)


Retrieves the return value for the predecessor task in a DAG of tasks. The return value is explicitly set by the predecessor task by calling the SYSTEM$SET_RETURN_VALUE function.





Identifier for the predecessor task that sets the return value to be retrieved.

  • If the task has only one predecessor task that is enabled, the argument is optional. If this argument is omitted, the function retrieves the return value for the only enabled predecessor task.

  • If the task has multiple predecessor tasks that are enabled, this argument is required.

Usage Notes

  • Task names are case sensitive.

  • When a task name is specified, it must match an enabled predecessor, otherwise the call will fail.


See complete examples for this function in SYSTEM$SET_RETURN_VALUE.