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On the same day, the default version of MARS will be changed to use these new default libraries.

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• The encoding of the keys affecting the description of the area and grid resolution (latitudeOfFirstGridPoint[InDegrees], latitudeOfLastGridPoint[InDegrees] longitudeOfFirstGridPoint[InDegrees] longitudeOfLasstGridPoint[InDegrees], iDirectionIncrement[InDegrees], jDirectionIncrement[InDegrees]) is restricted to millidegrees for GRIB 1 fields.  An attempt to represent these values with sub-millidegree precision via an interpolation with MARS or directly with EMOSLIB will result in an error and the retrieval will fail.  User programs setting these keys are unaffected.
  
• The default type for the mars keys "stream" and "class" in GRIB 1 messages is changed from "integer" to "string".  Users that have created GRIB index files using these keys will need to rebuild the index.

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module switchload metview/new

module load Magics/new

module switch emos/new

module switch grib_api/new

mars -t

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module switchload metview/old

module load Magics/old

module switch emos/old

module switch grib_api/old

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module switch emos/old

module switch grib_api/old

For a short time only, it will also be possible for users to use the The previous default version of MARS by using the "mars -p" command.can be used with 'mars -t -p'.