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### Running command:
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###   /home/biocbuild/bbs-3.21-bioc/R/bin/R CMD build --keep-empty-dirs --no-resave-data MethReg
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* checking for file ‘MethReg/DESCRIPTION’ ... OK
* preparing ‘MethReg’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘MethReg.Rmd’ using rmarkdown

Quitting from MethReg.Rmd:196-199 [unnamed-chunk-6]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `MatrixGenerics:::.load_next_suggested_package_to_search()`:
! Failed to find a rowRanges() method for NULL objects.
---
Backtrace:
     ▆
  1. ├─SummarizedExperiment::rowRanges(dna.met.chr21.se)
  2. └─SummarizedExperiment::rowRanges(dna.met.chr21.se)
  3.   ├─methods::callGeneric()
  4.   │ └─base::eval(call, parent.frame())
  5.   │   └─base::eval(call, parent.frame())
  6.   ├─MatrixGenerics::rowRanges(x = x)
  7.   └─MatrixGenerics::rowRanges(x = x)
  8.     ├─methods::callGeneric()
  9.     │ └─base::eval(call, parent.frame())
 10.     │   └─base::eval(call, parent.frame())
 11.     ├─MatrixGenerics::rowRanges(x = x)
 12.     └─MatrixGenerics::rowRanges(x = x)
 13.       └─MatrixGenerics:::.load_next_suggested_package_to_search(x)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'MethReg.Rmd' failed with diagnostics:
Failed to find a rowRanges() method for NULL objects.
--- failed re-building ‘MethReg.Rmd’

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

Error: Vignette re-building failed.
Execution halted