This error occurs at the start of the model run. It has been found to be caused by specific version of the Cray compiler, cce/8.5.8 that comes with cdt/17.03. There have been reports that older versions may also give the same error.
If this occurs, we recommend recompiling the model code with a more recent version. The model has been tested successfully with cdt versions 17.09, 18.04 and 18.07.
If this is not possible, then recompiling the model with lower optimization, -O1, also fixes the problem. To reduce the optimization, edit the file make/cfg/cce-opt.cfg, edit the line that begins $OIFS_FFLAGS{?} =
and change -O2
to -O1
.