Error(s) in re-building vignettes:
--- re-building 'IRMRI-Example.Rnw' using Sweave
oro.nifti 0.11.4
Loading required package: awsMethods

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

Loading required package: parallel

Error: processing vignette 'IRMRI-Example.Rnw' failed with diagnostics:
 chunk 9 (label = 7) 
Error in solve.default(ICovx[, , i]) : 
  Lapack routine dgesv: system is exactly singular: U[1,1] = 0

--- 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
could not determine path to Imagemagick 

    please set the correct path manually using 

    'Sys.setenv(ImageMagick='path2imagemagick')'
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 '/d/RCompile/CRANpkg/local/4.5/qMRI.Rcheck/vign_test/qMRI/vignettes'
pdflatex -interaction nonstopmode IRMRI-Example.tex
This is pdfTeX, Version 3.141592653-2.6-1.40.24 (MiKTeX 23.1) (preloaded format=pdflatex.fmt)
 restricted \write18 enabled.
entering extended mode
(IRMRI-Example.tex
LaTeX2e <2022-11-01> patch level 1
L3 programming layer <2023-02-02>
(C:\Program Files\MiKTeX\tex/latex/base\article.cls
Document Class: article 2022/07/02 v1.4n Standard LaTeX document class
(C:\Program Files\MiKTeX\tex/latex/base\size10.clo))
(C:\Program Files\MiKTeX\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Package filecontents Warning: This package is obsolete.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'.


(C:\Program Files\MiKTeX\tex/latex/biblatex\biblatex.sty
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Package biblatex Warning: Using fall-back BibTeX(8) backend:
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) (C:\Program Files\MiKTeX\tex/latex/biblatex\biblatex.def)
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(C:\Program Files\MiKTeX\tex/latex/biblatex/bbx\standard.bbx))
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(C:\Program Files\MiKTeX\tex/latex/biblatex\biblatex.cfg)
(C:\Program Files\MiKTeX\tex/latex/l3kernel\expl3.sty
(C:\Program Files\MiKTeX\tex/latex/l3backend\l3backend-pdftex.def))
(C:\Program Files\MiKTeX\tex/latex/biblatex\blx-case-expl3.sty
(C:\Program Files\MiKTeX\tex/latex/l3packages/xparse\xparse.sty)))
(D:/RCompile/recent/R/share/texmf/tex/latex\Sweave.sty
(C:\Program Files\MiKTeX\tex/latex/graphics\graphicx.sty
(C:\Program Files\MiKTeX\tex/latex/graphics\graphics.sty
(C:\Program Files\MiKTeX\tex/latex/graphics\trig.sty)
(C:\Program Files\MiKTeX\tex/latex/graphics-cfg\graphics.cfg)
(C:\Program Files\MiKTeX\tex/latex/graphics-def\pdftex.def)))
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(C:\Program Files\MiKTeX\tex/latex/base\fontenc.sty))
No file IRMRI-Example.aux.
(C:\Program Files\MiKTeX\tex/latex/biblatex/lbx\english.lbx)
No file IRMRI-Example.bbl.
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[Loading MPS to PDF converter (version 2006.09.02).]
) (C:\Program Files\MiKTeX\tex/latex/epstopdf-pkg\epstopdf-base.sty
(C:\Program Files\MiKTeX\tex/latex/grfext\grfext.sty
(C:\Program Files\MiKTeX\tex/generic/kvdefinekeys\kvdefinekeys.sty))
(C:\Program Files\MiKTeX\tex/latex/00miktex\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 '/d/RCompile/CRANpkg/local/4.5/qMRI.Rcheck/vign_test/qMRI/vignettes'
Error in tools::buildVignettes(dir = "d:/Rcompile/CRANpkg/local/4.5/qMRI.Rcheck/vign_test/qMRI",  : 
  running 'make' failed
Execution halted