Ok, I wonder if this helps? I found this message when I went to my remoterig control box's web page:
Saved error message:
Data Abort at 0x00038e88, called by 0x00038ff4
I can reproduce the problem but it's very contrived and seems peculiar to something N1MM+ does, because I can't reproduce it in WinTest. Unfortunately, it's also in firmware V2.84
I can try and give more detail if required (or perhaps capture the serial data?), but briefly (with N1MM+ V1.0.4616.0):
1) N1MM+ menu Config/"CW Autosend Threshold" set to 1.
2) N1MM+ in Run mode, Rig in CW.
3) Type F1TTT in call entry window: N1MM+ (and hence the winkeyer) starts sending after the "F1T" is entered, and sends the complete exchange - in my case that is "F1TTT 001 IO51VW". Actually, for some reason it only sends F1TT as the call but with the correct exchange, but that might be a different problem?
4) Don't log the QSO, instead hit F12 to wipe it.
5) Enter F1TTT in call entry window (again) - no cw is sent (it should be...) and the remoterig control box reboots.
I can't help feeling that this winkeyer stuff is causing you more trouble than it's worth, sorry!
Regards, Mark