what's wrong this?

[Phone_KR]

on inventory click:
    if inventory name is ":offset_-8::withdraw_lolam:":
        cancel event
        if event-inventory is not player's inventory:
            if clicked slot is 41 or 42:
                play sound "BLOCK_NOTE_BLOCK_BIT" with volume 1 and pitch 2 at player
                if number of all air slots in player's inventory is not smaller than ceil({coin} / 64) + ceil({bill} / 64) + ceil({bundle_of_bills} / 64):

(error: inventory of the player is not a world)
if number of all air slots in player's inventory is not smaller than ceil({coin} / 64) + ceil({bill} / 64) + ceil({bundle_of_bills} / 64):


i don't know why this isn't worked

what's the error mean?

help....

 

[Phone_KR]

I could find the similar sentences in skunity-docs-'can hold'......
It took 2 hours to find.

I changed it as follows:
if player has enough space for {coin} of itemsadder item "paper_custom:coin":
if player has enough space for {bill} of itemsadder item "paper_custom:bill":
if player has enough space for {bundle_of_bills} of itemsadder item "paper_custom:bundle_of_bills":

It be consistent with my intention.