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When yo do SeaDAS-OCSSW->Install/update OC processors you need to check "VIIRS DEM files" too.

SeaDAS 7 should not be the problem. I have both SeaDAS 7 and 8 on my Mac.

What operating system are you using?

What is your geographic location?

We are scratching our heads. The lock file looks suspicious. I wonder what is in that file. You can try "rm ~/.seadas8/lock" before you attempt to open seadas8 on the command line. If frozen again, "ls -al ~/.seadas8" and check if the lock file show up. Or you can also try "...

It seems to me your ~/.netrc is not set up correctly: *** ERROR: Authentication Failure retrieving: *** oceandata.sci.gsfc.nasa.gov/ob/getfile/PM1ATTNR.P2008358.0800.003 *** Please check that your ~/.netrc file is setup correctly and has proper permissions. *** *** see: https://oceancolor.gsfc.nasa....

After quitting seadas 8, did you try to open it again? Did it freeze again once you clicked "No"?

What does it say when you type "ls -al ~/.seadas8" on command line?

Judging from the SeaDAS/System info output, I am not sure you have installed modisA processor correctly.

Did you do SeaDAS-OCSSW → Install/Update OC Processors as descibed in https://seadas.gsfc.nasa.gov/downloads/?

Here is the link you can find L1A files for December 23, 2008. The one corresponding to MOD00.P2008358.0950_1.PDS is A2008358095000.L1A_LAC: https://oceandata.sci.gsfc.nasa.gov/MOD ... /2008/358/

You can also find other MODIS-Aqua files here:
https://oceandata.sci.gsfc.nasa.gov/MODIS-Aqua

Can you do "SeaDAS-OCSSW -> SeaDAS/System Info" and paste the printout here?

Also, please give the specific L0 file name you are working on, so I can try to replicate the error.

Please also tell us what version of SeaDAS you are using, what operating system you are on, what L0 file you are trying to work on and if you have installed modisa processor.