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The release of SeaDAS v7.4 will happen on 06 March 2017 (at least that is our intent).
OLCI will not be fully support, but (most) processing (OCSSW) will work provided you manually retrieve the required data files from the repository site.

Sean

> So is this a MERIS problem maybe?Possibly, although that's still puzzling.  I  tried grabbing the same file you listed, but our archive doesn't have it.We do have a very similar file:https://oceandata.sci.gsfc.nasa.gov/echo/getfile/MER_FRS_1PPEPA20050420_102153_000004392036_00323...

What is the output if you simply run l2gen on the command line without any calling arguments, e.g.:

$ cd $HOME/seadas-7.3.2/ocssw/run/bin/linux_64
$ ./l2gen

While you're there run:

$ git status

and post the output.

Sean

Carole,
We'll need a little more information...
How did you call l2gen?  What data were you processing? What parameters did you pass it?

Sean

The l2gen program has the ability to apply filters to the data during processing.  These are controlled by the filter options:  filter_opt (boolean) (default=false) = filtering input data option  filter_file (ifile) (default=$OCDATAROOT/sensor/sensor_filter.dat) = data file for input ...

You need to load a file (enter an input file) for the GUI to know what wavelengths you've got to work with...

You're welcome...BTW, the GUI *does* indicate the product is wavelength specific:

The product is wavelength-specific, you need to specify the wavelength of interest:a_nnn_qaabb_nnn_qaawhere nnn is replaced by the integer wavelength (e.g. a_412_qaa).If you leave nnn it will try to generate products for bands for which it cannot.But you can replace nnn with vvv to get all the visib...

Because they are scaled integers.

sst = scale_factor * scaled integer + add_offset

The chlorophyll product is stored as a floating point value in the L3 SMI files, the sst product is stored as a scaled integer.If Matlab is not applying the scale and offset to the scaled integers (although, George is correct in saying it should), youwill have to do so yourself to get the geophysica...