If you have limited items you try to put into a sack using "all." you get a confusing error message. I don't have a log for this, so I may be wrong on the details

For example suppose you're carrying
a pair of black leggings
a black iron broadsword(limited)

put all.black knapsack
You don't have any black.

You also get an incorrect messages if your item is cursed.

Here's a log of that one:

get shield haversack
You get a practice shield from a shoddy haversack.

exa shield
A practice shield is armor worn as a shield, made of wood, and weighs 6 pounds 11 ounces.

exa gems
A small handful of gems is a treasure, made of gem, and weighs 0 pounds 12 ounces.

put gems haversack
You can't let go of it.

put all.gems haversack
There isn't room to put anything in a shoddy haversack.

n/t