I was trying to perform RMA on *Mouse Exon 1.0 ST Array* as described in 
aroma website (link <http://www.aroma-project.org/replication/RMA>) using 
custom cdf MoEx-1_0-st-v1,coreR1,A20080718,MR.cdf.gz 

I have executed following code in R

cdf <- AffymetrixCdfFile$byChipType(chipType, tags="coreR1,A20080718,MR")
cs <- AffymetrixCelSet$byName("data_CEL", cdf=cdf);
bc <- RmaBackgroundCorrection(cs);
csB <- process(bc);
qn <- QuantileNormalization(csB, typesToUpdate="pm");
csN <- process(qn);
plm <- RmaPlm(csN);
ces <- getChipEffectSet(plm);
theta <- extractMatrix(ces);
rownames(theta) <- getUnitNames(cdf);
Error in `rownames<-`(`*tmp*`, value = c("6838637", "6992377", "6901592",  
  length of 'dimnames' [1] not equal to array extent

Please help me to understand this error and how can I solve this. The 
session info is given below.

With regards

R version 3.1.2 (2014-10-31)
Platform: x86_64-pc-linux-gnu (64-bit)

 [1] LC_CTYPE=fi_FI.UTF-8    LC_NUMERIC=C            
LC_TIME=en_GB           LC_COLLATE=en_GB        LC_MONETARY=fi_FI.UTF-8
 [6] LC_MESSAGES=en_GB       LC_PAPER=en_GB          
LC_NAME=C               LC_ADDRESS=C            LC_TELEPHONE=C         

attached base packages:
[1] stats4    parallel  stats     graphics  grDevices utils     datasets  
methods   base     

other attached packages:
 [1] preprocessCore_1.28.0         aroma.light_2.2.0             
aroma.affymetrix_2.12.8       aroma.core_2.12.8            
 [5] R.devices_2.12.0              R.filesets_2.6.0              
R.utils_1.34.0                R.oo_1.18.2                  
 [9] R.methodsS3_1.6.2             affxparser_1.38.0             
pd.moex10st.mm.aceviewg_0.0.1 affy_1.44.0                  
[13] BiocInstaller_1.16.1          pd.moex.1.0.st.v1_3.10.0      
RSQLite_1.0.0                 DBI_0.3.1                    
[17] moex10stmmrefseqcdf_19.0.0    AnnotationDbi_1.28.1          
GenomeInfoDb_1.2.3            oligo_1.30.0                 
[21] Biostrings_2.34.0             XVector_0.6.0                 
IRanges_2.0.0                 S4Vectors_0.4.0              
[25] Biobase_2.26.0                oligoClasses_1.28.0           

loaded via a namespace (and not attached):
 [1] affyio_1.34.0        aroma.apd_0.5.0      base64enc_0.1-2      
bit_1.1-12           codetools_0.2-8      digest_0.6.5        
 [7] DNAcopy_1.40.0       ff_2.2-13            foreach_1.4.2        
GenomicRanges_1.18.3 iterators_1.0.7      matrixStats_0.12.2  
[13] PSCBS_0.43.0         R.cache_0.11.0       R.huge_0.8.0         
R.rsp_0.19.6         splines_3.1.2        tools_3.1.2         
[19] zlibbioc_1.12.0     

When reporting problems on aroma.affymetrix, make sure 1) to run the latest 
version of the package, 2) to report the output of sessionInfo() and 
traceback(), and 3) to post a complete code example.

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