Add a resourse for threads, and make it FixedInteger, Then restart record, And click on " Thread Number " on the left upper corner, Then add your threads resourse inside it.
thanks at @Allister for the work around which helps me out to continue developing my script? @Fox the success number action should be able to track number of successful threads irrespective of were the action is being used in the main function or when call function in several threads action is used.