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Did you forget to attach the error?

Here is the help page for modis_GEO: https://seadas.gsfc.nasa.gov/help-8.1.0 ... s_GEO.html

Did you install oli processor? Please also make sure you installed OCSSW with tag V2021.2. Can you do "SeaDAS-OCSSW -> SeaDAS/System Info" and post the result here? Yes, I downloaded LC08_L1TP_121045_20131005_20170429_01_T1 (Collection 1 Level 1) from https://earthexplorer.usgs.gov/ Screen...

l2gen on LANDSAT 8 takes an L1B file(*MTL.txt) as the input.

Please make sure you have installed oli processor before you do l2gen. https://seadas.gsfc.nasa.gov/downloads/

This might be the problem: AttributeError: __enter__ This happens if you are using an old version of requests. What version of requests do you have? You need Python requests package v2.18.0 or later. Here is a similar post for your reference: https://forum.earthdata.nasa.gov/viewtopic.php?f=7&t=...

It is a bug that l2gen GUI does not allow you to choose Rrs_746 and Rrs_868, we'll try to fix it. For the time being, here is a workaround by running l2gen on command line instead of GUI: Click "Save Parameters" in the "Parfile" section on the l2gen GUI's "Main" tab, an...

Amita, It seems that you are not using the latest OCSSW tag, judging from "MODIS GEO version 6.1.0, built Dec 1 2020 09:48:48". Can you do SeaDAS-OCSSW -> SeaDAS/System Info and post the result here? When you do install/update OC Processors, please make sure you choose V2021.2 from the val...

You can try the development tag T2021.12 for now before the next operational(V) tag comes out.

l2gen on VIIRS takes L1(L1A or L1B) + GEO. You can download VIIRS L1A and VIIRS GEO from https://oceandata.sci.gsfc.nasa.gov (/VIIRS-JPSS1/L1/) geolocate_viirs takes VIIRS L1A and creates VIIRS GEO https://seadas.gsfc.nasa.gov/help-8.1.0/processors/ProcessGeolocate_viirs.html calibrate_viirs takes V...

The link you used to install OCSSW is for SeaDAS 7. https://oceandata.sci.gsfc.nasa.gov/ocssw/

Please follow the instruction under "Manual Installation" on this page to install OCSSW for SeaDAS 8.1.0: https://seadas.gsfc.nasa.gov/downloads/

You could try increasing your virtual memory available to SeaDAS 8.1.0 by
changing the -Xmx option in the <seadas-install-dir>/etc/seadas.conf file (in the line that begins with 'default_options'). Currently it is 4096M. Try 8196M or 16392M.