I'm trying to generate reflectance of Hyperion (242 tiffs) using FLAASH and getting error message (ACC error: avrd: No nonblank pixels found; IDL error: CDIVER4V3Rs: >>> Wait for MODTRAN4 calculation to finish...) Any suggestion? Steps I've taken 1. No data / bad bands (1-7) (58-78) (167-178)(225-242) are not used/omitted 2. Bands 8 - 57 layer stacked and b1/40 (band math) applied to get radiance (VNIR) 3. Bands (79-166), (179-224) layer stacked and b2/80 (band math) applied to get radiance(SWIR) 4. VNIR and SWIR 2 radiance files layer stacked and wavelengths and fwhm for each band is edited (on header file) 5. The combined VNIR & SWIR (180 bands) file is converted to BIL 6. Use FLAASH to convert the radiance BIL file to Reflectance (Parameters used: Lat/Long center of the area; scale factor 10; Satellite altitude 705km; Elevation 0.6 km; flight date /timeinserted; pixel size default (29.967m); Atmospheric Model (Mid-Latitude Summer); Aerosol Model (Rural); Spectral Polishing (Yes); Water Retrieval (No); Aerosol Retrieval (default); Width (number of bands) (9) (Somehow I cannot change it to 180 bands); Water Column Multiplier (default 1.0); Initial visibility (km) default (40); Wavelength Recalculation (default (No) 7. When I run FLAASH (after setting up input output file names) I get the error (ACC error: avrd: No nonblank pixels found; IDL error: CDIVER4V3Rs: >>> Wait for MODTRAN4 calculation to finish...) Any suggestion? Any advise will be most appreciated. Thanks. A. Mah