I am trying to mosaic several non-overlapping rasters together (they have same number of bands and same pixel sixe etc). I used the seamless mosaic tool in the envi gui and it worked great. When I tried to execute the ENVIMosaicRaster (https://www.harrisgeospatial.com/docs...) in IDL I got the error message "Mosaic raster input scenes are missing or invalid". During a different run I also got the error "ENVI::OPENRASTER: ENVI has not started." Any help/insights would be greatly appreciated! I used the code: PRO MOSAICBATCH2 COMPILE_OPT IDL2 ; Start the application e = ENVI(/HEADLESS) ; Select input scenes files = FILE_SEARCH('/gpfs/data/mike/lindb/WNV/WELD/temp/summer/' + '*.tif', count=count) print, count scenes = !NULL FOR i=0, N_ELEMENTS(files)-1 DO BEGIN raster = e.OpenRaster(files[i]) scenes = [scenes, raster] ENDFOR ; Create the mosaic raster mosaicRaster = ENVIMosaicRaster(scenes) ; Save it as ENVI format newFile = e.GetTemporaryFilename() mosaicRaster.Export, newFile, 'ENVI' ; Close the ENVI session e.Close END