Error(s) in re-building vignettes:
  ...
--- re-building ‘IRMRI-Example.Rnw’ using Sweave

Error: processing vignette 'IRMRI-Example.Rnw' failed with diagnostics:
 chunk 2 (label = 0b) 
Error in tempdir(check) : NA in coercion to Rboolean

--- failed re-building ‘IRMRI-Example.Rnw’

--- re-building ‘qMRI-Example.Rnw’ using Sweave
Loading required package: awsMethods

Use the function setCores() to change the number of CPU cores.

Loading required package: parallel
Reading RAW images requires to install dcraw, see 

    http://cybercom.net/~dcoffin/dcraw/ for LINUX and http://www.insflug.org/raw/
    for macOS and Windows 

Use awsMethods::setCores(ncores) to specify number of cores for openMP
oro.nifti 0.11.4
--- finished re-building ‘qMRI-Example.Rnw’

make[1]: Entering directory '/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/qMRI.Rcheck/vign_test/qMRI/vignettes'
pdflatex -interaction nonstopmode IRMRI-Example.tex
This is pdfTeX, Version 3.141592653-2.6-1.40.26 (TeX Live 2025/dev/Debian) (preloaded format=pdflatex)
 restricted \write18 enabled.
entering extended mode
(./IRMRI-Example.tex
LaTeX2e <2024-11-01> patch level 1
L3 programming layer <2024-12-25>
(/usr/share/texlive/texmf-dist/tex/latex/base/article.cls
Document Class: article 2024/06/29 v1.4n Standard LaTeX document class
(/usr/share/texlive/texmf-dist/tex/latex/base/size10.clo))
(/usr/share/texlive/texmf-dist/tex/latex/filecontents/filecontents.sty

Package filecontents Warning: This package is obsolete. Disabling it and
(filecontents)                passing control to the filecontents environment
(filecontents)                defined by the LaTeX kernel.

)

LaTeX Info: Writing file `./qmriIR.bib'.


(/usr/share/texlive/texmf-dist/tex/latex/biblatex/biblatex.sty
(/usr/share/texlive/texmf-dist/tex/generic/pdftexcmds/pdftexcmds.sty
(/usr/share/texlive/texmf-dist/tex/generic/infwarerr/infwarerr.sty)
(/usr/share/texlive/texmf-dist/tex/generic/iftex/iftex.sty)
(/usr/share/texlive/texmf-dist/tex/generic/ltxcmds/ltxcmds.sty))
(/usr/share/texlive/texmf-dist/tex/latex/etoolbox/etoolbox.sty)
(/usr/share/texlive/texmf-dist/tex/latex/graphics/keyval.sty)
(/usr/share/texlive/texmf-dist/tex/latex/kvoptions/kvoptions.sty
(/usr/share/texlive/texmf-dist/tex/latex/kvsetkeys/kvsetkeys.sty))
(/usr/share/texlive/texmf-dist/tex/latex/logreq/logreq.sty
(/usr/share/texlive/texmf-dist/tex/latex/logreq/logreq.def))
(/usr/share/texlive/texmf-dist/tex/latex/base/ifthen.sty)
(/usr/share/texlive/texmf-dist/tex/latex/url/url.sty)
(/usr/share/texlive/texmf-dist/tex/latex/biblatex/blx-dm.def)
(/usr/share/texlive/texmf-dist/tex/latex/biblatex/blx-compat.def)
(/usr/share/texlive/texmf-dist/tex/latex/biblatex/blx-bibtex.def

Package biblatex Warning: Using fall-back bibtex backend:
(biblatex)                functionality may be reduced/unavailable.

) (/usr/share/texlive/texmf-dist/tex/latex/biblatex/biblatex.def)
(/usr/share/texlive/texmf-dist/tex/latex/biblatex/bbx/authoryear.bbx
(/usr/share/texlive/texmf-dist/tex/latex/biblatex/bbx/standard.bbx))
(/usr/share/texlive/texmf-dist/tex/latex/biblatex/cbx/authoryear.cbx)
(/usr/share/texlive/texmf-dist/tex/latex/biblatex/biblatex.cfg)
(/usr/share/texlive/texmf-dist/tex/latex/l3kernel/expl3.sty
(/usr/share/texlive/texmf-dist/tex/latex/l3backend/l3backend-pdftex.def))
(/usr/share/texlive/texmf-dist/tex/latex/biblatex/blx-case-expl3.sty
(/usr/share/texlive/texmf-dist/tex/latex/l3packages/xparse/xparse.sty)))
(/home/hornik/tmp/R.check/r-devel-clang/Work/build/share/texmf/tex/latex/Sweave
.sty (/usr/share/texlive/texmf-dist/tex/latex/graphics/graphicx.sty
(/usr/share/texlive/texmf-dist/tex/latex/graphics/graphics.sty
(/usr/share/texlive/texmf-dist/tex/latex/graphics/trig.sty)
(/usr/share/texlive/texmf-dist/tex/latex/graphics-cfg/graphics.cfg)
(/usr/share/texlive/texmf-dist/tex/latex/graphics-def/pdftex.def)))
(/usr/share/texlive/texmf-dist/tex/latex/fancyvrb/fancyvrb.sty)
(/usr/share/texlive/texmf-dist/tex/latex/base/textcomp.sty)
(/usr/share/texlive/texmf-dist/tex/latex/base/fontenc.sty))
No file IRMRI-Example.aux.
(/usr/share/texlive/texmf-dist/tex/latex/biblatex/lbx/english.lbx)
No file IRMRI-Example.bbl.
(/usr/share/texlive/texmf-dist/tex/context/base/mkii/supp-pdf.mkii
[Loading MPS to PDF converter (version 2006.09.02).]
) (/usr/share/texlive/texmf-dist/tex/latex/epstopdf-pkg/epstopdf-base.sty
(/usr/share/texlive/texmf-dist/tex/latex/grfext/grfext.sty
(/usr/share/texlive/texmf-dist/tex/generic/kvdefinekeys/kvdefinekeys.sty))
(/usr/share/texlive/texmf-dist/tex/latex/latexconfig/epstopdf-sys.cfg))

! LaTeX Error: File `IRMRI-Example-concordance.tex' not found.

Type X to quit or <RETURN> to proceed,
or enter new name. (Default extension: tex)

Enter file name: 
! Emergency stop.
<read *> 
         
l.54 \input{IRMRI-Example-concordance}
                                      ^^M
!  ==> Fatal error occurred, no output PDF file produced!
Transcript written on IRMRI-Example.log.
make[1]: *** [Makefile:3: all] Error 1
make[1]: Leaving directory '/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/qMRI.Rcheck/vign_test/qMRI/vignettes'
Error in tools::buildVignettes(dir = "/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/qMRI.Rcheck/vign_test/qMRI",  : 
  running 'make' failed
Execution halted