Getting Token ')' Expected in middle of column name

[z-rising]

Trying to make an additional column that filters values - if column 1 has null, copy column B, else 0.

if(ISBLANK([unit_part_desc]),[manufac_volume]),0)

I'm getting a "Token ')' Expected" error, and when I click "Show Error," the letter "u" in "manufac_volume" (first one) is highlighted.

[Greg_Deckler · Accepted solution]

@z-rising 

if(ISBLANK([unit_part_desc]),[manufac_volume],0)