SF
Does a terminate end event in a loop subprocess interrupt the current iteration or all iterations?
Yes, the "terminate end event" abnormally terminates the process instance of a loop sub-process ("interrupts all iterations"). But be aware the difference between looping with several iterations and the concept of instantiating. A "terminate end events" always aborts only the process instance. So if you have a multi-instance sub-process (parallel or sequential) a "terminate end event" does not terminate the complete sub-process but only the running instance. A sub-process defined as standard loop is only instantiated once by the parent process instance where the sub-process is embedded.
Regards
Klemens