DIFFERENCES BETWEEN V3.1 and V3.0

Version 3.1 is not a major revision. It adds some optimizations for MPI execution, fixes some minor bugs which have been reported to us, and adds some additional features. The changes are,

• Guardcell filling can be applied more selectively. A set of masking arrays called GCELL_ON_CC, GCELL_ON_FC, GCELL_ON_EC and GCELL_ON_NC can be set to include or exclude variables from the solution data arrays during guardcell filling. For example, UNK(1,:,:,:,:) and UNK(4,:,:,:,:) might be included, while UNK(2,:,:,:,:) and UNK(3,:,:,:,:) were excluded.
• An optional argument to the checkpointing routines enables the user to include guardcells in the checkpoint files, provided they do not define NO_PERMANENT_GUARDCELLS.

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