MathCAD Prim Conversion - plots not plotting

[DS_10024912]

I've converted a MathCAD file into MathCAD Prime (ver. 7).   For some reason the plot doesn't show.   The functions appear to be working.   Not sure what I'm doing wrong.  (see attached screen capture)

EDIT - attached Mathcad Prime document

[LucMeekes]

Very nice picture, but... where is the Prime worksheet?

Success!
Luc

[DS_10024912]

I've attached the Mathcad Prime document

[LucMeekes · Accepted solution]

Labelling problem. You've been trapped by Prime's (in)famous autolabelling feature.

Check the labels of your various variables (all) named f. If you want them to be the same, they must be labelled the same.

Once corrected you (should) get:

Success!
Luc

[DS_10024912]

Can auto-labeling be turned off?

Is this something that occurs when importing - or is auto-labeling always on?

What labels need fixing in my document?  I can't see the labels.  

[DS_10024912]

This is what I did to get the graph to display.  On the horizontal of the graph where the variable f is located I selected the variable - and then Math --> Label and chose "variable" from the drop down.

[LucMeekes]

I guess it's one of those features of Prime that PTC is so proud of, they couldn't imagine to need a switch to turn it on/off...

Luc