Print with thicknesses of the lines. The thickness of the lines is not correct in print preview

-- Ensure that the option "print lineweights" in the mask "Print" in "Advanced", is selected.

If the thickness of lines is set from a file of the print. Ctb

-- Make sure also that in the file. Ctb are configured right thickness in relation to colours.

If the thickness of lines is set from a file of the print. Stb

-- Make sure your file. Stb are configured right thickness in relation to the styles