My feature extraction on a 5 band image fails. Same image with 4 bands works fine. Symptom is that the layers section only shows band 1 in grayscale, although the data manager shows all 5 bands. Scaling produces one (big black) segment. The first clue that it won't work is that the preview pane reveals nothing, even after several minutes of calculating statistics. I will try the 5th band as a mask instead, although I read that might not work either. Would appreciate any words of wisdom to help with using this tool. Of note is that the 5 band image is float, and the 4 band image is 16 bit integer. Don't see a way in the envi gui to specify output data type on layer stacking, so if that's the problem I'll just find another way. Thank you. Carolyn file info: Dims: 3519 x 6229 x 5 [BSQ] Data Type: Float Size: 438,397,020 bytes File Type: ENVI Projection: UTM, Zone 13 N Datum : WGS-84 Pixel : 30 Meters File: Z:\data\san_luis_valley\slv_tm2\3434_database\tm_3434_20XX\irrSums\sum_img_at_mxGrn_wslope Dims: 3519 x 6229 x 5 [BSQ] Data Type: Float Size: 438,397,020 bytes File Type: ENVI Projection: UTM, Zone 13 N Datum : WGS-84 Pixel : 30 Meters