I will do it tonight. Before that I will try the previous on a different sd-card just to make sure I get the same results. So erasing the nonvol from region 41 is all or nothing, right?

I did the backup and got the same thing. I the run the erase script and the log file looks like this:

nüvi 14xx Series Software Version 6.30, UID: 3834618533, HWID: 3834618533
------------------------------------------------------------------------------
Parsing "ergn,41"

I doesn't say successful as before