Error(s) in re-building vignettes:
--- re-building ‘metaboGSE.Rmd’ using rmarkdown
Loading required package: sybil
Loading required package: Matrix
Loading required package: lattice
Loading required package: ape

Loading required package: glpkAPI
using GLPK version 4.65
Loading required package: topGO
Loading required package: BiocGenerics
Loading required package: parallel

Attaching package: 'BiocGenerics'

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

    clusterApply, clusterApplyLB, clusterCall, clusterEvalQ,
    clusterExport, clusterMap, parApply, parCapply, parLapply,
    parLapplyLB, parRapply, parSapply, parSapplyLB

The following object is masked from 'package:Matrix':

    which

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, which.max, which.min

Loading required package: graph

Attaching package: 'graph'

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

    complement, edges

Loading required package: Biobase
Welcome to Bioconductor

    Vignettes contain introductory material; view with
    'browseVignettes()'. To cite Bioconductor, see
    'citation("Biobase")', and for packages 'citation("pkgname")'.

Loading required package: GO.db
Loading required package: AnnotationDbi
Loading required package: stats4
Loading required package: IRanges
Loading required package: S4Vectors

Attaching package: 'S4Vectors'

The following object is masked from 'package:Matrix':

    expand

The following object is masked from 'package:base':

    expand.grid

Loading required package: SparseM

Attaching package: 'SparseM'

The following object is masked from 'package:base':

    backsolve


groupGOTerms: 	GOBPTerm, GOMFTerm, GOCCTerm environments built.

Attaching package: 'topGO'

The following object is masked from 'package:IRanges':

    members

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

    algorithm, algorithm<-, allGenes, genes


Building most specific GOs .....
	( 2331 GO terms found. )

Build GO DAG topology ..........
Quitting from lines 166-204 (metaboGSE.Rmd) 
Error: processing vignette 'metaboGSE.Rmd' failed with diagnostics:
argument is of length zero
--- failed re-building ‘metaboGSE.Rmd’

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

Error: Vignette re-building failed.
Execution halted