Hi, I'm having a problem with ENVI_DOIT, 'ENVI_LAYER_STACKING_DOIT'. I have a large number of files, with different dimesions that i need to perform band math on. I am trying to stack them first so that they will have the same dimensions allowing me to sum the bands in a 'math doit' function ( 2 images, 1 band each per pass). However, when i stack just two of the images ( 1 band each), the resulting image only has zeroes ( the pixel values are lost). When i use the envi widget for layer stacking, the values are preserved. In both cases the default interpolation is used. Please advise what is going wrong. Is any one esle having this trouble? I included a print out for dmax values for the image before and after stacking. The max is 6 before and 0 after ( every time). Please advise, ska1