Tag definition confusion

[DeltaMasterMind]

var crit as number
foreach pick in hero from BaseWep where "wProfReq.Exotic | !wProfReq.Martial | !wProfReq.Simple"
crit = eachpick.tagvalue[wCritMult.?]
crit += 1
perform eachpick.delete[wCritMult.?]
perform eachpick.assignstr["wCritMult." & crit]
nexteach

This script is telling me the wCritMult.1 tag is not defined. Granted it is working just not sure what is happening and would like to get a better understanding.
Plus it is the same between timings pre level 50000 to Final Phase 50000.

 

[Mathias]

Add a safety check - if there is no wCritMult tag to begin with, set crit = 2. x2 is the default, so lots of weapons leave that blank.

And there are no weapons in Pathfinder with a x1 crit multiplier, so there's been no need to add the tag.