Hello, Anyone got this error in calculation with variable?

[tony2n91]

I got this error all the time. How can i do it correctly?

[tony2n91]

I'm using set variable with Espression (not using String)

[A Former User]

@tony2n91 this happend bacause the type of your variables is "string", so you have to change it to the type "number"

Number([[A1]]) + Number([[A2]])