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### Running command:
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###   /Library/Frameworks/R.framework/Versions/Current/Resources/bin/R CMD build --keep-empty-dirs --no-resave-data MSGFplus
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* checking for file ‘MSGFplus/DESCRIPTION’ ... OK
* preparing ‘MSGFplus’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
      -----------------------------------
* installing *source* package ‘MSGFplus’ ...
** using staged installation
** R
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
** building package indices
** installing vignettes
** testing if installed package can be loaded from temporary location
Warning in fun(libname, pkgname) : NAs introduced by coercion
Warning in fun(libname, pkgname) : NAs introduced by coercion
Error: package or namespace load failed for ‘MSGFplus’:
 .onLoad failed in loadNamespace() for 'MSGFplus', details:
  call: if ((major == 1 && minor < 8) || major < 1) {
  error: missing value where TRUE/FALSE needed
Error: loading failed
Execution halted
ERROR: loading failed
* removing ‘/private/tmp/RtmpG2fHfg/Rinst1bf41298d920/MSGFplus’
      -----------------------------------
ERROR: package installation failed