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

--- re-building ‘intro.Rmd’ using rmarkdown
Loading required package: IRanges
Loading required package: BiocGenerics

Attaching package: 'BiocGenerics'

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

    IQR, mad, sd, var, xtabs

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

    Filter, Find, Map, Position, Reduce, anyDuplicated, append,
    as.data.frame, basename, cbind, colnames, dirname, do.call,
    duplicated, eval, evalq, get, grep, grepl, intersect, is.unsorted,
    lapply, mapply, match, mget, order, paste, pmax, pmax.int, pmin,
    pmin.int, rank, rbind, rownames, sapply, setdiff, sort, table,
    tapply, union, unique, unsplit, which.max, which.min

Loading required package: S4Vectors
Loading required package: stats4

Attaching package: 'S4Vectors'

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

    I, expand.grid, unname

Loading required package: GenomicRanges
Loading required package: GenomeInfoDb
Quitting from lines 68-71 (intro.Rmd) 
Error: processing vignette 'intro.Rmd' failed with diagnostics:
there is no package called 'rtracklayer'
--- failed re-building ‘intro.Rmd’

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

Error: Vignette re-building failed.
Execution halted