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### Running command:
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###   /Library/Frameworks/R.framework/Resources/bin/R CMD build --keep-empty-dirs --no-resave-data LowMACA
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* checking for file ‘LowMACA/DESCRIPTION’ ... OK
* preparing ‘LowMACA’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘LowMACA.Rmd’ using rmarkdown
Can't locate XML/Simple.pm in @INC (you may need to install the XML::Simple module) (@INC contains: ##PATH_TO##/bioperl-1.6.924 /Users/biocbuild/perl5/perlbrew/perls/5.26.2/lib/site_perl/5.26.2/darwin-thread-multi-2level /Users/biocbuild/perl5/perlbrew/perls/5.26.2/lib/site_perl/5.26.2 /Users/biocbuild/perl5/perlbrew/perls/5.26.2/lib/5.26.2/darwin-thread-multi-2level /Users/biocbuild/perl5/perlbrew/perls/5.26.2/lib/5.26.2).
BEGIN failed--compilation aborted.
Can't locate LWP.pm in @INC (you may need to install the LWP module) (@INC contains: ##PATH_TO##/bioperl-1.6.924 /Users/biocbuild/perl5/perlbrew/perls/5.26.2/lib/site_perl/5.26.2/darwin-thread-multi-2level /Users/biocbuild/perl5/perlbrew/perls/5.26.2/lib/site_perl/5.26.2 /Users/biocbuild/perl5/perlbrew/perls/5.26.2/lib/5.26.2/darwin-thread-multi-2level /Users/biocbuild/perl5/perlbrew/perls/5.26.2/lib/5.26.2).
BEGIN failed--compilation aborted.

Quitting from lines  at lines 127-140 [unnamed-chunk-4] (LowMACA.Rmd)
Error: processing vignette 'LowMACA.Rmd' failed with diagnostics:
'.service_validate_md5sum' failed:
  Not Found (HTTP 404).
--- failed re-building ‘LowMACA.Rmd’

SUMMARY: processing the following file failed:
  ‘LowMACA.Rmd’

Error: Vignette re-building failed.
Execution halted