OCPN won't launch - Win XP SP3

[AedanC]

When you refer to the "NMEA debug window" do you mean the one in OpenCpn or a different one in Amarillo?

[boaboot]

I refer to the NMEA window in opencpn. I found out that windows XP received the NMEA sentences but opencpn could not show them in the charts. I got to too an error message with the old CMAP program that told too that there was an error on COM4.
I changed the USB serial to COM10 and the problem was solved for opencpn. I expect that there is a conflict in assigning between com ports. Cmap still has a problem. I expect because it expects a value of 1-4.
And as far as I know now Opencpn higher then V4.0.0. expects a CPU with SSE2 or higher, which my old industrial PC does not have.
So I expect my problem is solved. Thanks for the attention.