I am trying to have a line drawn at a length that is to be calculated from other components of the dynamic block.
That is, the length of Line A = (Value of Action Parameter B)^2*(Attribute A - Attribute B)/(Value of Action Parameter B/.
From what I could find, I should be able to go into Parameters Manager and type into the Expressions column the formula. However, I cannot get C3D to recognize the Action Parameters or Attribute as valid variables in an expression. I can add User Parameters and reference those, but not those I need. I get an error "A dependent expression cannot be evaluated. The syntax is incorrect or a variable is not defined."
See the image. Any help?