You could attach the output of Safety VI to a variable. Create post and pre step callbacks with the sequence file that check the new variable. when variable set true the terminate all is sent.
I have attach an example.
The sequence file does a random number test in a loop 10 times.
Abort Button VI displays a button thats sets a fileglobal variable. when this is set the test aborts
Random Number Test VI is just a random number numeric test.
Hope this helps
