6 Other differences

• IGNORED and IGNOUT fields are converted to EXPORTED and EXPOUT respectively.

• The file areas.nc is not needed anymore to calculate some statistics with options CHECKIN and/or CHECKOUT.

• SEQ index is no longer needed to ensure correct coupling sequencing within the coupler. Use of SEQ allows the coupling layer to detect potential deadlocks before they happen and to exit gracefully (see section 2.5.4).

• The I/O library mpp_io is no longer used to write the restart and output files.