It sounds like you have wavelengths defined for your dataset that are outside the range where FLAASH can work. Did you use the Hyperion Toolkit to import and preprocess your data prior to using FLAASH? This is a very useful tool to prepare Hyperion data for FLAASH and can be downloaded from the Code Library under User Community on this website.

Good day! I have error with FLASH as well. i'm working on MODIS 1km data and use FLAASH to do the atmospheric correct. error : problem: the flash program exited with the following errors: ACC error: lsmooth2: opening cloud mask file IDL error: ACC_LSMOOTH2: Cannot continue with smoothing calculation. what does this mean? How can I fix it? Thank you very much in advance. Kind regards, Zoya

Try turning off the Adjacency correction in the Advanced Parameters. Large pixel sensors such as MODIS and AVHRR have difficulty with this correction and it doesn't help much because the scattered light stays within the original pixel.

Thanks a lot! It works! Zoya