Kevin,

Wow, there's a trip down memory lane. That chunk of code hasn't been touched since 2016.
You are absolutely correct, it should default to Relative. The issue is that Relative will only work if the file chosen has a relative path. If a user chooses a file on a different drive, it will simply error out.
It appears we settled on having it default to Full for maximum utility and minimum error, but it's one of those cases where it was so long ago, and the code is not commented fully in that regard, I'm just not clear on why we didn't have it simply try Relative first, and if that doesn't work, then revert to Full. Or perhaps it needs a validator function, to compare the drawing path with the chosen xref, and determine then if Relative will even work. Likely, a combination of the two.
All to say, just not the 2 minute fix I was hoping it would be, the last day before a holiday.
I've gotten it logged, and should be able to get to this in December. It's a small job, just not small enough for today.
Excellent point, thanks for bringing it to our attention.

--J

Sure thing. Hopefully I didn't dredge up too big of a headache.

We're making the switch to ACC - using relatives will make our lives much easier.