I'm trying to use the Split() function to split up a string into a list of strings, as is the intended purpose. The strings I'm using look something like this:

1;Curse;10

However, instead of returning a list of strings, the function returns a list of objects. So if I try doing something like this:

splitlist = split ( "1;Curse;10" )
ToInt (ListItem (splitlist, 2) )

That causes this error:
FunctionCallElement: Could find not function 'ToInt(Object)'

Basically, what am I doing wrong?

It's not an objectlist.

ListItem has a declared return type of 'string or object`, because you can use it on any type of list.

But because Split is a built-in function, Quest checks that the function inside of it has a declared return type of 'string' before even attempting to run it.

splitlist = split ( "1;Curse;10" )
listitem = ListItem (splitlist, 2)
ToInt (listitem)

will work fine; because it asks "what type is this variable?", rather than "what type can ListItem return?"

This is why there is a separate function StringListItem, which only works on stringlists.