This is sort of a style nitpick, but it's also weird.
Creo appears to use a couple different parameters based on the type of hole. As far as I know, if you have a hole, and you're using a callout instead of dimensioning it directly via a section view or similar, the hole depth should have the little depth symbol in front of it. It's something like ctrl+a x (or SHIFT-X if caps lock is on) ctrl+b if you need to generate it manually, but the symbol shouldn't be there if it's a THRU hole.
So your parameters VAR_DEPTH and DRILL_DEPTH (and VAR_THREAD and THREAD_DEPTH for tapped holes) return the depth symbol and the hole depth respectively for holes with a specified depth, and nothing and THRU for through holes. Piece of cake.
Well sort of. As far as I can tell for drilled or clearance holes things work differently. Clearance holes don't even have an option to be a specified depth (although there is an option for them to stop at a feature), so I'm not overly concerned about those. However for drilled holes DRILL_DEPTH is still either VAR or THRU, but VAR_DEPTH always returns with no symbol. In fact, if you place callout formulas with identical conditions except for DRILL_DEPTH in your .hol table on top of each other, Creo will always pick whichever one is first- it's not even looking at DRILL_DEPTH even if it's a parameter in the callout table and shows up in the callout.
Now it just so happens that I have an application where I need to specify a blind, drilled hole and I noticed that the depth symbol dissapeared in that callout but reappeared if I set the type to "tapped" with the same variables. This shouldn't come up too often, but I just recently got my .hol tables working so my machinists don't complain about the style and I don't have to manually generate every single hole callout, and I was hoping I had every callout style covered so I could have them auto-update if changes were made in the model and everything would always be correct. (If you're looking for starter .hol tables there's an old thread on this site with nice examples and a machinist-friendly callout style)
So is this a bug, a feature, me being incorrect about a hole depth always requiring a depth symbol, or me not knowing some hidden variable or config.pro setting that would magically make this better (95% of the issues I've ever had with Creo are because of this)?
If Creo was looking at the DRILL_DEPTH column in the .hol table in the first place it wouldn't even be an issue, because I could change those callouts to always have the depth symbol instead of using VAR_DEPTH.
Edit: I should mention that the new callout provides the drill size normally used to make that diameter hole along with the diameter.