Just came back from this 2 Beautiful countries.
I used iGO8 (as habit) with "HERE" map for Croatia, and the local providor's "Monolit" for Slovenia.
I was In Croatia only for short period (but long drive), and the only problem was a crash for missing icon (3 times).
In Slovenia, while driving on freeways and highways it was OK, and the map (roads) was accurate. The problem was the speed limits. In most cases, the speed limit on out side cities is wrong
. The most popular error is showing 90 k/h when the real allowed speed in 60 or 70.
I didn't use Primo, so I can't tell about the behavior of hnr or other related files.
I'll look for this missing file and see if I can restore the route without crashing.
EDIT: The file was found in the data.zip in /ui_igo8/480_800/ and I copy it to /ui_igo8/480_272/ and now the route simulation works perfect.