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Attempting to use legacy versions of Intel® MPI Library on newer operating systems will lead to segmentation faults. The segfault is due to an incompatibility in glibc. Option #1: Create a file strtok_proxy.c with attached code. Compile this file using the following commands: gcc -c -Wall -Werror -fpic ./strtok_proxy.c gcc -ldl -shared -o ./strtok_proxy.so ./strtok_proxy.o And apply the generated library at runtime using the following: export LD_PRELOAD=./strtok_proxy.so Option #2: Try Intel MPI 2019.8 included in 2021 R1 installation, backup and edit {installed_path}/v211/ansys/bin/anssh.ini file. 1.Uncomment line # 1880 from: ##ANS_TEMP=”${ANS_TEMP}:${ANSYSCOMMON_DIR}/MPI/Intel/${intel_mpi_version}/${ANSYS_SYSDIR}/bin/legacy” To: ANS_TEMP=”${ANS_TEMP}:${ANSYSCOMMON_DIR}/MPI/Intel/${intel_mpi_version}/${ANSYS_SYSDIR}/bin/legacy” 2.Uncomment line #1889 and #1890 from: ##setenv I_MPI_VAR_CHECK_SPELLING “0” ##setenv FI_PROVIDER_PATH “${I_MPI_ROOT}/libfabric/lib/prov” To: setenv I_MPI_VAR_CHECK_SPELLING “0” setenv FI_PROVIDER_PATH “${I_MPI_ROOT}/libfabric/lib/prov” 3.Uncomment line # 1952 from: ##ANS_TEMP=”${ANS_TEMP}:${ANSYSCOMMON_DIR}/MPI/Intel/${intel_mpi_version}/${ANSYS_SYSDIR}/libfabric/lib” To: ANS_TEMP=”${ANS_TEMP}:${ANSYSCOMMON_DIR}/MPI/Intel/${intel_mpi_version}/${ANSYS_SYSDIR}/libfabric/lib” 4.Change line # 2207 from: setenv intel_mpi_version “2018.3.222” to 2019.8.254: setenv intel_mpi_version “2019.8.254” 5.Comment out lines # 2242-2244 from: if [ -z “${I_MPI_DYNAMIC_CONNECTION}” ]; then setenv I_MPI_DYNAMIC_CONNECTION “no” fi To ## if [ -z “${I_MPI_DYNAMIC_CONNECTION}” ]; then ## setenv I_MPI_DYNAMIC_CONNECTION “no” ## fi

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