Suggest to add an option to propogate failure status to parent node.
 

In a parent child relationship such as a group used for subroutine calls, the parent status for a group is immediately set to success.

If the previous suggestion I entered is implemented, then it should be relatively simple to add a check box or drop down combo to allow the user to dictate the relative success or failure or a parent node based on the status of childs nodes.

(i.e. Fail If : All children fail, One child Fails, No Children fail)

Additionally the success/fail state of a subroutine call should reflect the success/fail state of the top-level node called. Not if the scripting engine could actually find the step.