Compensation within Multiple-Join

Question

In a process, I define a global exception (not an exception transition. It is an exception event). After this exception, it is a compensation event (not the compensation transition), an interactive activity named showResult, and an automatic activity (named GoTo). The showResult can get the user selection options including back/skip. The GoTo automatic activity can return the instance to the place where the exception is thrown.
In the process, there is a multiple-join activity. Inside the Multiple-Join, there is an interactive activities. I can define the branch number in the runtime. The Join activity can throw a business exception and cought by the exception handle.
I set all branch to the the fault situation (interactive activity in each brance cannot throw exception). Each brance has a number as follows:
/instance number/1
/instance number/2
/instance number/3
All the above instances are in the Join.
Then the instance (/instance number/0 ) is in the activity showResult. However, I do not know how to make this instance return to Multiple and redo the interactive activity inside this Gate
Sincerely

Answer 1

If your condition is more complex (not just the number of completed copies) you can always do it using the action variable in the Multiple-Join activity:
if( ... ) {
    action = RELEASE;
}