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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 MMUPHin
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* checking for file ‘MMUPHin/DESCRIPTION’ ... OK
* preparing ‘MMUPHin’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘MMUPHin.Rmd’ using rmarkdown

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

Quitting from lines 320-325 (MMUPHin.Rmd) 
Error: processing vignette 'MMUPHin.Rmd' failed with diagnostics:
At core/community/optimal_modularity.c:87 : GLPK is not available, Unimplemented function call
--- failed re-building ‘MMUPHin.Rmd’

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

Error: Vignette re-building failed.
Execution halted