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### Running command:
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###   /home/biocbuild/R/R/bin/R CMD build --keep-empty-dirs --no-resave-data MBCB
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* checking for file ‘MBCB/DESCRIPTION’ ... OK
* preparing ‘MBCB’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘MBCB.Rnw’ using Sweave
Loading required package: tcltk
Warning: no DISPLAY variable so Tk is not available
Loading required package: tcltk2
Read 5 items
1 / 4  complete.
2 / 4  complete.
3 / 4  complete.
4 / 4  complete.
1 / 4  complete.
2 / 4  complete.
3 / 4  complete.
4 / 4  complete.
1 / 4  complete.
2 / 4  complete.
3 / 4  complete.
4 / 4  complete.
1 / 4  complete.
2 / 4  complete.
3 / 4  complete.
4 / 4  complete.
1 / 4  complete.
2 / 4  complete.
3 / 4  complete.
4 / 4  complete.

Error: processing vignette 'MBCB.Rnw' failed with diagnostics:
 chunk 11 (label = open GUI) 
Error in structure(.External(.C_dotTclObjv, objv), class = "tclObj") : 
  [tcl] invalid command name "toplevel".


--- failed re-building ‘MBCB.Rnw’

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

Error: Vignette re-building failed.
Execution halted