Hello,
While conducting a workshop on Bioconductor arrayQC we have encountered the following error but not on all machines.
 
Error in .nextMethod(e1, e2) : 
  comparison of these types is not implemented
 
This error is generated upon trying to generate new objects.
 
Could you please help solve this issue? I am told -I am not an R expert- that there must be a problem associated to handling S4 class objects.
 
Thank you,
 
Lauro
 
In my particular case this is the session info:
> sessionInfo()
R version 2.6.0 Under development (unstable) (2007-09-04 r42752) 
i386-pc-mingw32 
locale:
LC_COLLATE=Spanish_Spain.1252;LC_CTYPE=Spanish_Spain.1252;LC_MONETARY=Spanish_Spain.1252;LC_NUMERIC=C;LC_TIME=Spanish_Spain.1252
attached base packages:
[1] splines   tools     stats     graphics  grDevices utils     datasets  methods   base     
other attached packages:
 [1] arrayQualityMetrics_1.0.17 CCl4_1.0.5                 limma_2.11.11              simpleaffy_2.13.01         affyPLM_1.13.6            
 [6] gcrma_2.9.1                matchprobes_1.9.10         affydata_1.11.3            RColorBrewer_1.0-1         vsn_3.0.14                
[11] affy_1.15.7                preprocessCore_0.99.12     affyio_1.5.8               genefilter_1.15.11         survival_2.32             
[16] geneplotter_1.15.9         lattice_0.16-4             annotate_1.15.6            AnnotationDbi_0.1.12       RSQLite_0.6-0             
[21] DBI_0.2-3                  Biobase_1.15.30           
loaded via a namespace (and not attached):
[1] grid_2.6.0         KernSmooth_2.22-21

Commands that generated the same type of error:
> object<-new("AffyBatch")
Error in .nextMethod(e1, e2) : 
  comparison of these types is not implemented
> object<-new("NChannelSet")
Error in .nextMethod(e1, e2) : 
  comparison of these types is not implemented
 
 
Lauro Sumoy
Microarray Laboratory
Bioinformatics and Genomics Program
Center for Genomic Regulation (CRG)
Dr. Aiguader 88
08003 Barcelona
Spain
Office Phone: +34-93-316-0125
CRG Fax: +34-93-316-0099
e-mail: lauro.sumoy@crg.es
http://www.crg.es <http://www.crg.es/>  
---------------------------
Microarray Laboratory Phone: +34-93-316-0126
Microarray Services Office: +34-93-316-0272
Microarray Bioinformatics Office: +34-93-316-0238
Program Secretarial Office: +34-93-316-0110

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