The Fire on Change does not recognize a transition from invalid to 0 or 0 to invalid as a change of the variable. The default value was setup as 0, so it may be that it only does nat recognize the transition from valid to invalid and vice versa as a change. Either way, the system should recognize the transition between valid and invalid as a change.

This is a bug we have already documented in other testing here at Murphy. It is scheduled to be fixed in the next major release (version 2.3).

In addition, there is a work arround. The one we have found that works is to use angel script to check the variable and basically use a state machine to fire the angel scripted event on a periodic basis. Basically, you have to poll the state of the variable, at least until it has changed at least once.

Brian McRae
Software Test Lead
FW Murphy