Hi, I'm using the marray functions to import data from an Agilent scanner. I have no problems until I go to normalize the data (maNormMain). I get the error: > pilot.norm<-maNormMain(pilot.raw) Error: dim<- length of dims do not match the length of object I believe this is happening because the dimensions of the Agilent array as I entered it are: 1 Block/Sector 105 Columns 215 Rows And if I remake the layout with 2 or more Blocks/Sectors everything works fine. I'm guessing that it causes an error with 1 Block b/c it tries to do within-print-tip normalization and this corresponds to a single tip(?). In any case, I've found a work around, but does anyone know the specific reason for this error? If it is related to the within-print-tip normalization, then can I override this and just use global loess normalization? Thanks in advance, Joel