Ah yes. I did try that. My Notebook only has USB and EasyDCC assigned
COM5 via a USB to Serial adapter cable. This works fine. Sprog's
install assigned COM6 and I did try changing it to another unused COM
port. COM 3 & 4 appeared to be unused on the list so I tried COM 4. No
change to the symptoms.

That was all before I wrote my question to the list last weekend.

Now I am thinking on two possible tests:

1. Trying to use COM 5 for the Sprog as the EasyDCC USB is not
plugged in when the SPROG II is.
2. I have a work Notebook! I can try a complete install on this
other Notebook. It uses many different USB devices at different
times...... I also have a desktop PC near my modelling
workbench. Also with many USB ports. Can try it on that PC
perhaps before I clutter my work Notebook.

Will let you know how it works out.

Thanks for the prompt to think outside the box!

Brett

andrew_croslanduk wrote:
> Brett,
>
> Another suggestion based on experiences of another user. Do you have
> any other devices (even if not currently connected) that use "virtual
> COM ports"?
>
> It may be worth re-assigning the COM port assignment and see if that
> makes a difference. Open the driver properties in device manager.
> Under PortSettings - Advanced there is a drop down to select a
> different COM port. Try on that you definitely do not otherwise use,
> and remember to change the JMRI preferences.
>
> Does that help?
>
> Andrew
>
>