https://forums.garmin.com/showthread.ph ... post147089
In short, if you want to "copy" a track into a new "list" so you can slice and dice, modify, etc. DO NOT "COPY" the track and paste it into the new list. Instead, right-click the track and "Duplicate" it. This creates a new track with the same name and a "001" at the end (or whatever). Then you can safely Cut & Paste this new track into your working list to play with.
If instead, you use "copy", it's not really a copy of the track--only a copy of the reference to the track. If you are a software developer, that concept makes perfect sense. All you really need to know is that, it's not really a copy of the track, and if you mess with it, you are messing with the original track--and thus you risk losing your original track data.
I have lost several original tracks this way already....but, lucky for me, I still have the original gdb Mapsource files and backup copies.
I develop software. When developing features, you run into this problem all the time--"hmmmmm, many users will expect this feature to work this way, but some will expect this other functionality. Implementation idea #1 has these ABC downsides and benefits. Idea #2 has these XYZ downsides and benefits. What to do?" Well...you do what is SAFEST. That is, you choose the lesser evil. I think Garmin may have chosen the greater evil with some of the choices in Basecamp.
BUT...I like it better than Mapsource for overall functionality and speed.

 
							
 
  BTW, check the attachment..
  BTW, check the attachment..
