I wonder if I either do something wrong, or perhaps it is just not supported.
I am just trying to make this simple Calculated Column in my Calculation View

It doesn't matter if the formula is
if("TotalVltdStockQuantity">0,1,0)
or
if("TotalVltdStockQuantity">0,'true','false')
both is returning this, when I click »Validate Syntax«

But when I click »OK« on the Calculated Column, the window closes, but the Calculated Column is not created - why?