Hi, I am trying to build an annotation object with AnnBuilder for a GEO object (GPL285). The base is a list of Genbank accessions, and I would like to map them to EntrezGene ID. When I used: ABPkgBuilder(baseName=myBase, srcUrls=mySrcUrls, baseMapType=c("gb"), pkgPath=myDir, organism="Mus musculus",pkgName = "mouseGPL285", version = "1.1.0",author = list(authors = "myname", maintainer = "myname@myemail.com"), fromWeb = T) I got the following error: Error in getBaseFile(baseName) : Base file NM_021600 may not be valid or have two columnsBase file NM_008964 may not be valid or have two columnsBase file NM_009835 may not be valid or have two columnsBase file NM_013683 may not be valid or have two columnsBase file AK004566 may not be valid or have two columnsBase file AK018362 may not be valid or have two columnsBase file NM_022813 may not be valid or have two columnsBase file NM_025325 may not be valid or have two columnsBase file NM_019798 may not be valid or have two columnsBase file AK012908 may not be valid or have two columnsBase file AK004668 may not be valid or have two columnsBase file AK016497 may not be valid or have two columnsBase file AK021136 may not be valid or have two columnsBase file NM_021557 may not be valid or have two columnsBase file AK007036 may not be valid or have two columnsBase file NM_026161 may not be valid or have two columnsBase file AK003760 may not be valid or have two columnsBase file NM_030710 ma In addition: Warning messages: 1: the condition has length > 1 and only the first element will be used in: if (file == "") file <- stdin() else { 2: only first element of 'description' argument used 3: cannot open file 'NM_021600', reason 'No such file or directory' Would you please help me solve the problem? Thank you very much. Sam --------------------------------- Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel and lay it on us. [[alternative HTML version deleted]]