iQAN script 6.01 - Function undefined for if statement

Hi, 

I am struggling to write a basic iQANscript file which contains if statements or switch cases. Essentially, when I drag & drop an if() box onto my script, the name I give it to - for instance "If (var_bool = True)" - has no effect on the if statement.  In fact, no matter what value I assign to var_bool beforehand, the program will directly go to the associate "else" statement. 

When I check the script file, it gives me the following hint: 

I have consulted the iQANscript documentation but it gives no detailed instruction on how to declare an if statement and associate it to a function. 

Thank you,