Hi, I'm currently investigating this error: Error in mk_singleBracketReplacementValue(x, value) that was reported to me there: http://permalink.gmane.org/gmane.sci...onductor/43677. Following the traceback: 1: easyRNASeq(filesDirectory = getwd(), organism = "Hsapiens", annotationMetho 2: easyRNASeq(filesDirectory = getwd(), organism = "Hsapiens", annotationMetho 3: parallelize(obj = filesList, fun = .doCount, nnodes = nbCore, rnaSeq = obj, 4: parallelize(obj = filesList, fun = .doCount, nnodes = nbCore, rnaSeq = obj, 5: parallelize(obj, fun, nnodes, ...) 6: parallelize(obj, fun, nnodes, ...) 7: .parallelize(obj, fun, nnodes, ...) 8: lapply(obj, fun, ...) 9: lapply(obj, fun, ...) 10: FUN(X[[1]], ...) 11: fetchCoverage(rnaSeq, format = format, filename = filename, filter = filter 12: fetchCoverage(rnaSeq, format = format, filename = filename, filter = filter 13: coveragealn.info$rng.list[match(valid.names, namesaln.info$rng.list))], w 14: coveragealn.info$rng.list[match(valid.names, namesaln.info$rng.list))], w 15: .local(x, shift, width, weight, ...) 16: normarg_for_multiple_coverage(weight, "weight", x_len, names(x), 1) 17: `[<-`(`*tmp*`, arg2ref, value = <s4 object="" of="" class="" "compressednumericlist"="" 18:="" `[<-`(`*tmp*`,="" arg2ref,="" value="&lt;S4" object="" of="" class="" "compressednumericlist"="" 19:="" mk_singlebracketreplacementvalue(x,="" value)="" lead="" me="" to="" the="" iranges:::normarg_for_multiple_coverage="" function,="" where="" the="" origin="" of="" this="" error="" is="" located.="" i="" can="" however="" not="" easily="" track="" it="" further="" down.="" i="" have="" attached="" a="" rda="" file="" that="" contains="" the="" environment="" of="" that="" function="" call.="" running="" the="" following="" reproduces="" the="" error:="" library(iranges)="" load("data-to-reproduce-error.rda")="" arg2[arg2ref]="" <-="" arg="" any="" help="" would="" be="" greatly="" appreciated="" :-)="" my="" sessioninfo()="" r="" version="" 2.15.1="" (2012-06-22)="" platform:="" x86_64-apple-darwin10.8.0="" (64-bit)="" locale:="" [1]="" en_gb.utf-8="" en_gb.utf-8="" en_gb.utf-8="" c="" en_gb.utf-8="" en_gb.utf-8="" attached="" base="" packages:="" [1]="" stats="" graphics="" grdevices="" utils="" datasets="" methods="" base="" other="" attached="" packages:="" [1]="" iranges_1.15.44="" biocgenerics_0.3.2="" loaded="" via="" a="" namespace="" (and="" not="" attached):="" [1]="" stats4_2.15.1="" cheers,="" nico="" ---------------------------------------------------------------="" nicolas="" delhomme="" genome="" biology="" computational="" support="" european="" molecular="" biology="" laboratory="" tel:="" +49="" 6221="" 387="" 8310="" email:="" nicolas.delhomme="" at="" embl.de="" meyerhofstrasse="" 1="" -="" postfach="" 10.2209="" 69102="" heidelberg,="" germany="" ---------------------------------------------------------------="" --------------="" next="" part="" --------------="" <="" div="">