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What version of SeaDAS are you using? SeaDAS 8.2.0? What tag of OCSSW are you using? V2022.0?

When the PM1ATTNR_NRT and PM1EPHND files are available, the api called by modis_attteph.py returns status 1, because the PM1ATTNR_NRT files are classified as non-optimal. https://oceandata.sci.gsfc.nasa.gov/api/atteph/A/2022118111000/2022118111500 {"files":[["ATT1","PM1ATTNR...

When you use the -d option (Disable download of ancillary files not found on hard disk), it is correct to get the message "Downloads disabled. The following missing file(s) will not be downloaded: PM1EPHND.P2022115.1200.003 PM1ATTNR_NRT.A2022116.1045.061 PM1ATTNR_NRT.A2022116.1040.061 PM1ATTNR_...

Maybe you could try before you try modis_GEO again.

Try to run and then try modis_GEO.py again

Please let us know what version of SeaDAS you are using? SeaDAS 7 or 8? Please also let us know the name of one of modis L1A files that modis_GEO.py failed on. Here is another post regarding modis_GEO. The user has issues with modis L1A files on 2/11/2020. https://forum.earthdata.nasa.gov/viewtopic....

Try "--epixl=100", "--eline=100" as arguments

Actually, l2gen has no problems taking an SST file as icefile.

If you can share the name of your MSI S2A L1 file, we might be able to download the data from copernicus and help you further. The error you got is probably not due to the length of the file name. Another user got a similar error trying to do l2gen on S2A_MSIL1C_20160401T160029_N0201_R054_T17SQC_201...

Yes, it's easier to install OCSSW through SeaDAS GUI.

Here is the help page for SeaDAS 7.5.3 -- https://seadas.gsfc.nasa.gov/help-7.5.3/