these are not processed, and do not go on the output queue (so no overflow msg)
my suspicion is that for some reason the output queue is not being read at all... but if you don't retry, I don't understand why the queue would overflow... unless what is happening is you are assuming the messages are processed, and then continuing to send other midi messages i.e. its not really anything to do with the sysex.... what happens if you don't send the sysex messages at all? do other midi message get thru?
yes, its all changing... and is the reason usb hub will work, obviously the flipside, is that as all the code is new, we don't have the experience with the quantity of devices we did with the old code, , though we have tested the devices we have, and they generally look ok, and have helped highlight a few issues, but we will only know for sure, when its released and others test their devices.
(of course, we are assuming, and hopeful that most devices will work perfectly ok)
one change, which I need to get some time to do, is to allow for receiving/processing of sysex... but been a bit busy with other things.