Using the command
latexdiff-vc --preamble=diffpreamble.tex --git -r XXX -r XXX main.tex
does not pass the parameter --preamble=diffpreamble.tex to latexdiff, but considers it an input tex file. Renaming diffpreamble.tex to diffpreamble is a workaround.
Using the command
latexdiff-vc --preamble=diffpreamble.tex --git -r XXX -r XXX main.tex
does not pass the parameter--preamble=diffpreamble.tex
to latexdiff, but considers it an input tex file. Renamingdiffpreamble.tex
todiffpreamble
is a workaround.