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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 GeneGA
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* checking for file ‘GeneGA/DESCRIPTION’ ... OK
* preparing ‘GeneGA’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘GeneGA.Rnw’ using Sweave
Loading required package: seqinr
Loading required package: hash
hash-2.2.6.2 provided by Decision Patterns

sh: RNAfold: command not found

Error: processing vignette 'GeneGA.Rnw' failed with diagnostics:
 chunk 3 
Error in system(paste("echo ", x, "|RNAfold", sep = ""), intern = T) : 
  error in running command

--- failed re-building ‘GeneGA.Rnw’

SUMMARY: processing the following file failed:
  ‘GeneGA.Rnw’

Error: Vignette re-building failed.
Execution halted