WF4 to Mathcad analysis

[Horwarth19]

I'm having some trouble getting the two to talk with each
other. I have the tags in mathcad set to "proe2mc" for
the variables that I want, but when I select the dimension
in Pro/E I get the message of "no properly tagged Mathcad
variables found". I don't need it to go back, I am only
using mathcad to verify my design has the correct
compressions needed. What am I missing? I can't figure
it out.