See: Install OpenIFS for more details on how to download and install OpenIFS.
Release: v01. Known Issues
Pressure level output. A bug in this version prevents the model from writing GRIB output on anything other than model levels. This is fixed in the next release. For advice on how to fix this bug please contact: openifs-support@ecmwf.int.
OpenMP: some compiler versions (intel and some gfortran versions) are known to produce SEGV if OpenMP is enabled in optimized compilation. This will be fixed in a future release. In the meantime, we recommend that if you find this occurs, remove OpenMP options from the compilation and only use MPI.
Intel compiler. We recommend using -O1 and no higher for the intel compiler. At high optimization levels (-O2), the intel compiler causes SEGV when executing on processors that support the SSE4.1 and AVX instruction sets (Harpertown & Sandybridge CPUs). The FCM configuration files for the Intel compiler use a default of -O1 for the optimized build.
Bit reproducibility: The Intel MKL library is known to cause non-reproducible results. If this is an issue a code wrapper can be applied.
For more details, or assistance, please contact : openifs-support@ecmwf.int.