[BioC] Error while executing estimateCommonDisp

[Surjyendu Ray [guest]]

Dear all,
         I have a data set where there are two samples, each with four replicates. I have created a DGEList object with the relevant count data. While executing the command: 
estimateCommonDisp(Massed_Spaced_Isoform.DGEList, rowsum.filter = 1)
I get the following error:
"Error in if (mx < tol) { : missing value where TRUE/FALSE needed"
The traceback() output is:
3: estimatePs(object, maxr)
2: equalizeLibSizes(object, disp = disp, null.hypothesis = FALSE)
1: estimateCommonDisp(Massed_Spaced_Isoform.DGEList, rowsum.filter = 1)

      Please advise.
     Thanking you. 

 -- output of sessionInfo(): 

R version 2.15.1 (2012-06-22)
Platform: x86_64-unknown-linux-gnu (64-bit)

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

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

other attached packages:
[1] edgeR_2.6.10 limma_3.12.1

--
Sent via the guest posting facility at bioconductor.org.