Dear all,

DESeq2 "results" function is generating the following error:

Error in .classEnv(classDef) :
  trying to get slot "package" from an object of a basic class ("NULL") with no slots

Restarting R session as in "DESeq2 testing ratio of ratios (RIP-Seq, CLIP-Seq, ribosomal profiling)" didn't help. Any idea on how to solve this ?

R version 3.2.2 (2015-08-14)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: CentOS release 6.5 (Final)

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C               LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8     LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8    LC_PAPER=en_US.UTF-8
 [8] LC_NAME=C                  LC_ADDRESS=C               LC_TELEPHONE=C             LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

loaded via a namespace (and not attached):
 [1] Rcpp_0.12.5                RColorBrewer_1.1-2         futile.logger_1.4.1        GenomeInfoDb_1.6.3         plyr_1.8.3                 XVector_0.10.0             futile.options_1.0.0
 [8] zlibbioc_1.16.0            rpart_4.1-10               RSQLite_1.0.0              annotate_1.48.0            gtable_0.2.0               lattice_0.20-33            Matrix_1.2-6
[15] DBI_0.4-1                  parallel_3.2.2             RcppArmadillo_0.6.600.4.0  gridExtra_2.2.1            genefilter_1.52.1          cluster_2.0.4              S4Vectors_0.8.11
[22] IRanges_2.4.8              locfit_1.5-9.1             stats4_3.2.2               grid_3.2.2                 nnet_7.3-12                Biobase_2.30.0             data.table_1.9.6
[29] AnnotationDbi_1.32.3       XML_3.98-1.4               survival_2.39-4            BiocParallel_1.4.3         foreign_0.8-66             latticeExtra_0.6-28        Formula_1.2-1
[36] geneplotter_1.48.0         DESeq2_1.10.1              ggplot2_2.1.0              lambda.r_1.1.7             Hmisc_3.17-4               scales_0.4.0               splines_3.2.2
[43] BiocGenerics_0.16.1        GenomicRanges_1.22.4       SummarizedExperiment_1.0.2 xtable_1.8-2               colorspace_1.2-6           acepack_1.3-3.3            munsell_0.4.3
[50] chron_2.3-47

Here's a link to someone who posted the same error, upgrading and restarting R worked for them:

C: DESeq2 testing ratio of ratios (RIP-Seq, CLIP-Seq, ribosomal profiling)