I use TeX Live (2019/W32TeX) and run the engineer-pad.tex example.
\documentclass{article}
\usepackage[pattern=majmin, colorset=engineer]{gridpapers}
\begin{document}
\thispagestyle{empty}
~
\end{document}
There are four error as following. And I skip those errors and run pdflatex twice
! Package pgf Error: Pattern `' already defined.
See the pgf package documentation for explanation.
Type H <return> for immediate help.
...
l.545 \GP@declaretripat
?
! Package pgf Error: Pattern `' already defined.
See the pgf package documentation for explanation.
Type H <return> for immediate help.
...
l.546 \GP@declarelightconepat
?
! Package pgf Error: Pattern `' already defined.
See the pgf package documentation for explanation.
Type H <return> for immediate help.
...
l.547 \GP@declaredotpat
?
! LaTeX Error: Missing \begin{document}.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.547 \GP@declaredotpat
?
) (./graph paper.aux)
\openout1 = `"graph paper.aux"'.
At the same time, text appears in the output PDF.

The input of other mode parameters results in a completely black pdf output.
Could this be a problem with the Tex Live version?
I use TeX Live (2019/W32TeX) and run the
engineer-pad.texexample.There are four error as following. And I skip those errors and run
pdflatextwiceAt the same time, text appears in the output PDF.

The input of other mode parameters results in a completely black pdf output.
Could this be a problem with the Tex Live version?