Dear Pedro and List, My text files form Agilent Mouse miRNA Microarray Release 12.0 G4471A-021828 has two extra columns which are not in GSE19232 Agilent human microRNA array v 2.0 (G44708) - "start" and "sequence". When these are deleted AgiMicroRNA works. I do not know if this is due to the array or software or processing options on the software. This clears up the problem with maMicroRna( which i have been writing you about. It would be nice if this could be taken into automatically in a future version of AgiMicroRNA, but this solves my porblem for now. Thanks and best wishes, Rich ------------------------------------------------------------ Richard A. Friedman, PhD Associate Research Scientist, Biomedical Informatics Shared Resource Herbert Irving Comprehensive Cancer Center (HICCC) Lecturer, Department of Biomedical Informatics (DBMI) Educational Coordinator, Center for Computational Biology and Bioinformatics (C2B2)/ National Center for Multiscale Analysis of Genomic Networks (MAGNet) Room 824 Irving Cancer Research Center Columbia University 1130 St. Nicholas Ave New York, NY 10032 (212)851-4765 (voice) friedman at cancercenter.columbia.edu http://cancercenter.columbia.edu/~friedman/ In Memoriam, George Scithers