On Jun 20, 2015, at 4:51 AM, Axel Kowald <[log in to unmask]> wrote: > I decided to use the doLoop and collect my data in static class variables. > Because that worked fine I'm now also trying to use the -parallel option. > It seems that my static variable is filled from all parallel batches. > How is this possible if all batches run in independent threads? Are > there some issues when different threads try to read/write into the same > variable? > I'm normally not using parallel stuff, so please excuse if this is trivial. If you want to run parallel jobs, you CANNOT use static class variables: you'd create a race condition. Do *not* do that. Parallel runs must be done with entirely separate simulation instances that share nothing in common. This isn't a MASON thing, it's a foundational result in parallel programming. Sean