how to mathmatically increment a variable by another variable

[mhamlett101]

{Add("{Line(3)}","{vPPAIQTotal}")}

trying to increment a variable by an amount

doing a Set Variable action

not totaling
looping thru a text file, extracting a comma delimited field
the totaling the $'s on each line to a grand total

[Oleg]

It seems we solved this problem

Probably you forgot about the option Expand value : https://robotask.com/help/index.html?setvariable.htm
If you want to set the value of a variable and use the same variable in an expression, this option is required.