On 2013-05-07 19:16, Bob Armstrong wrote: You need to type "RUN BRU" and so on. Yep, FWIW that's it. Operator error. Sorry. You can say "RUN BRU" in BRUSYS and nothing else. Not "BRU", "RUN $BRU", "INS BRU", or anything else... :-) The explanation is actually pretty simple for all this. BRUSYS is actually an 11S system (I said 11M before, but that is wrong). So it's all just memory resident stuff. Anyway, "RUN $BRU" is a shorthand form for "RUN SY:[sysuic]BRU.TSK". As this is an 11S system, there are no disks, and such a command is totally unusable. Also, such a command in reality turns into an invocation of "...INS", which also do not exists in an 11S system. "BRU" in a normal RSX system means MCR should try to invoke ...BRU. There is no "...BRU" installed in BRUSYS. "RUN BRU" means run the installed imaged called "BRU ", which is the one that do exist. The full list of tasks existing in BRUSYS is: MCR... RCT... BAD BRU FMT CNF Fun, isn't it? :-) Johnny