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l2gen on Landsat 8 collection2 seems work with SeaDAS 8.3.0 and SeaDAS Processors (OCSSW) V2022.3.

Please let us know your SeaDAS version and SeaDAS processors tag.

Please make sure you have olcis3a and/or olcis3b installed.

Also choose xfdumanifest.xml (with absolute path) as ifile on l2gen GUI

On the SeaDAS GUI, choose SeaDAS-Toolbox -> Install/Update SeaDAS Processors, check olcis3a and/or olcis3b, and click run. https://seadas.gsfc.nasa.gov/help-8.3.0/processors/InstallOCSSW.html Choose SeaDAS-Toolbox -> l2gen, choose xfdumanifest.xml as your ifile, and click run https://seadas.gsfc.nas...

If you have another copy of python3 in /usr/local/bin/, it might be easier to point SeaDAS to use that copy of python3 by adding this line export PATH="/usr/local/bin/python3:$PATH" to your bash file. And then run: /usr/local/bin/pip3 install requests If you still want to use /Users/masud/...

It's hard to tell if a .xml file is doing what it is supposed to do by just looking at it. If you share the gpt command line with the ifile name, I can test it for you. As we discussed in the post https://forum.earthdata.nasa.gov/viewtopic.php?t=3823#p13616, SeaDAS can not write to netCDF4-CF at the...

SeaDAS processors (OCSSW) V2022.3 works best with SeaDAS 8.3.0. With V2022.3, we use the new naming convention -- https://oceancolor.gsfc.nasa.gov/docs/filenaming-convention/. For A2010283180500.L1A_LAC (MODIS AUQA L1A) modis_GEO -> AQUA_MODIS.20101010T180500.GEO.hdf (GEO) from L1A modis_L1B -> AQUA...

In SeaDAS 8.3.0 GUI, can you do SeaDAS-Toolbox -> Software & System Info and post the result here? "ModuleNotFoundError: No module named 'requests'" indicates SeaDAS can't find "requests''. It's probably due to some environment variable not setting up correctly. There are a few po...

SeaDAS can read L1A, L1B, L2, L3m MODIS AQUA files obtained from this site or created by SeaDAS processors. SeaDAS can also read most other MODIS AQUA files in .nc or .hdf format.
https://seadas.gsfc.nasa.gov/

mapgen on an L2 file is equivalent to l2bin + l3mapgen. It seems mapgen fails doing l2bin with l2_flags as one of the products. Please try python path/SeaDAS/ocssw/bin/mapgen --ifile=path/A2020003181000.L2_LAC_OC.x.nc --ofile=path/mapgenTest_A2020003181000.L2_LAC_OC.x.nc --product=chlor_a --resoluti...

SeaDAS has a tool l3mapgen that can create a level 3 mapped file from a level 3 binned file, and SeaDAS can read the mapped file.

Here is an introduction to SeaDAS -- https://seadas.gsfc.nasa.gov/
and the help on l3mapgen -- https://seadas.gsfc.nasa.gov/help-8.3.0/processors/ProcessL3mapgen.html