TexMaker F1 Problem After Qt6 Install
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Looks like it's unrelated to Qt 6 then. Did you try to check if there's a log or something generated by TexMaker ? Did you try to start it from the command line ? 
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Looks like it's unrelated to Qt 6 then. Did you try to check if there's a log or something generated by TexMaker ? Did you try to start it from the command line ? @SGaist The log for TexMaker when I press F1: 
 LOG FILE :
 This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2015/Debian) (preloaded format=pdflatex 2017.2.4) 11 OCT 2020 11:58
 entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
 **Print2DGraphics.tex
 (./Print2DGraphics.tex
 LaTeX2e <2016/02/01>
 Babel <3.9q> and hyphenation patterns for 81 language(s) loaded.
 (/usr/share/texlive/texmf-dist/tex/latex/base/book.cls
 Document Class: book 2014/09/29 v1.4h Standard LaTeX document class
 (/usr/share/texlive/texmf-dist/tex/latex/base/bk12.clo
 File: bk12.clo 2014/09/29 v1.4h Standard LaTeX file (size option)
 *********Middle Part of File Deleted because it was too big.
 They are messages about formatting the document.\makeMPintoPDFobject=\count166 
 \everyMPtoPDFconversion=\toks48
 ) (/usr/share/texlive/texmf-dist/tex/generic/oberdiek/pdftexcmds.sty
 Package: pdftexcmds 2011/11/29 v0.20 Utility functions of pdfTeX for LuaTeX (HO
 )
 (/usr/share/texlive/texmf-dist/tex/generic/oberdiek/ifluatex.sty
 Package: ifluatex 2010/03/01 v1.3 Provides the ifluatex switch (HO)
 Package ifluatex Info: LuaTeX not detected.
 )
 Package pdftexcmds Info: LuaTeX not detected.
 Package pdftexcmds Info: \pdf@primitive is available.
 Package pdftexcmds Info: \pdf@ifprimitive is available.
 Package pdftexcmds Info: \pdfdraftmode found.
 )
 (/usr/share/texlive/texmf-dist/tex/latex/oberdiek/epstopdf-base.sty
 Package: epstopdf-base 2010/02/09 v2.5 Base part for package epstopdf
 (/usr/share/texlive/texmf-dist/tex/latex/oberdiek/grfext.sty
 Package: grfext 2010/08/19 v1.1 Manage graphics extensions (HO)
 (/usr/share/texlive/texmf-dist/tex/generic/oberdiek/kvdefinekeys.sty
 Package: kvdefinekeys 2011/04/07 v1.3 Define keys (HO)
 ))63 words of extra memory for PDF output out of 10000 (max. 10000000) It seems to indicate that the pdf file was written, but I checked and it was not. I hope it helps. 
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@ofmrew said in TexMaker F1 Problem After Qt6 Install: Package ifluatex Info: LuaTeX not detected. I don't know if it's related but worth a check. 
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@ofmrew said in TexMaker F1 Problem After Qt6 Install: Package ifluatex Info: LuaTeX not detected. I don't know if it's related but worth a check. 
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Did you re-install TexMaker ? 
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After removing Qt 6 ? 
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@SGaist I removed Qt6 and reinstalled it, then I uninstalled TexMaker and reinstalled it. Same problem, note that this is on win 10. Win 10 also has qt5 installed. I have not tried it on Mint Linux. The question now is should I remove TexMaker and all versions of qt, the try TexMaker with no qt installed? 
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@SGaist I removed Qt6 and reinstalled it, then I uninstalled TexMaker and reinstalled it. Same problem, note that this is on win 10. Win 10 also has qt5 installed. I have not tried it on Mint Linux. The question now is should I remove TexMaker and all versions of qt, the try TexMaker with no qt installed? @ofmrew said in TexMaker F1 Problem After Qt6 Install: The question now is should I remove TexMaker and all versions of qt, the try TexMaker with no qt installed? That was the idea, yes. 
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@ofmrew said in TexMaker F1 Problem After Qt6 Install: The question now is should I remove TexMaker and all versions of qt, the try TexMaker with no qt installed? That was the idea, yes. @SGaist I am getting back to this problem; however, to do so will mean that I will need to remove Qt and the Qt3D that I painfully installed. I would like to move Ninja and Vulkan so that I will not need to build them, also. I would like to save conan3D which was the conan build directory, but will that not work when I reinstall Qt6? Any advise? I wish there was a workaround to this TexMaker problem. 
