QTR-Quadtone RIP

finally i found this message from the terminal:
"Creating curve UC-fa-warm-cf
Invalid linearize curve -- not constantly increasing"

"not constantly increasing" is at the black end of the wedge. because
there is to much ink! (epson 2100; hahnemühle photorag). and that's
why i thought,. i should linearize. 

i hope, my questions are not to silly... i'm a beginner with measuring
tools as well as a posting being.

chris