MPI related Errors for ANSYS-20.1

One of my users was facing the issues when running ANSYS-20.1 Fluent

Error: eval: unbound variable
Error Object: c-flush
...
...
...
libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs1
libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs2
libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs1
libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs2
libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs1
fluent_mpi.20.1.0: Rank 0:110: MPI_Init: ibv_create_qp(left ring) failed
fluent_mpi.20.1.0: Rank 0:110: MPI_Init: probably you need to increase pinnable memory in /etc/security/limits.conf
fluent_mpi.20.1.0: Rank 0:110: MPI_Init: ibv_ring_createqp() failed
fluent_mpi.20.1.0: Rank 0:110: MPI_Init: Can't initialize RDMA device
fluent_mpi.20.1.0: Rank 0:110: MPI_Init: Internal Error: Cannot initialize RDMA protocol
...
...
...

There were a few steps that we took to resolve the issues. Do look at the generated logs which will give lots of information. If you are using the PBS-Professional. your fluent script may look like this.

fluent 3ddp -g -t$nprocs -mpi=ibmmpi -cflush -ssh -lsf -cnf=$PBS_NODEFILE -pinfiniband -nmon -i $inputfile >& $PBS_JOBID.log 2>&1
  • Do note that “-cflush” and that it should be placed after the -mpi flag. From our observation, if the -cflush is placed before -mpi, it seems to initiate the flush, but another error would be generated.
  • Make sure you choose the right mpi parameter.

 

Fixing can’t load screen14 issues for ANSYS 2020-R1

I was having this strange issue when running ANSYS ICEM

"Fixing can't load screen14 issues, using variable
Signal 11 caught!
Segmentation violation - exiting after doing an emergency save"

The Issue can easily resolved. It is due to errors due to missing fonts libraries

# yum install xorg-x11-fonts-*
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: mirror.newmediaexpress.com
* epel: download.nus.edu.sg
* extras: mirror.newmediaexpress.com
* updates: mirror.newmediaexpress.com
Package xorg-x11-fonts-ISO8859-1-75dpi-7.5-9.el7.noarch already installed and latest version
Package xorg-x11-fonts-Type1-7.5-9.el7.noarch already installed and latest version
Resolving Dependencies
--> Running transaction check
---> Package xorg-x11-fonts-100dpi.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-75dpi.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-ISO8859-1-100dpi.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-ISO8859-14-100dpi.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-ISO8859-14-75dpi.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-ISO8859-15-100dpi.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-ISO8859-15-75dpi.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-ISO8859-2-100dpi.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-ISO8859-2-75dpi.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-ISO8859-9-100dpi.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-ISO8859-9-75dpi.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-cyrillic.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-ethiopic.noarch 0:7.5-9.el7 will be installed
---> Package xorg-x11-fonts-misc.noarch 0:7.5-9.el7 will be installed
--> Finished Dependency Resolution

The Issue should be resolved.

Webinar – Best of Healthcare with ANSYS

Introduction to Healthcare Series

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Computational Modeling of Thoracic Aortic Aneurysm and Its Treatment

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Biomaterials Selection for Biomedical Applications

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Webinar – Powering Your optical Design and Simulation with ANSYS SPEOS

CADIT_ANSYS_22May2020

ANSYS SPEOS
ANSYS SPEOS enable you to design and optimize your optical system quickly and easily, speed your time to market, reduce your physical prototyping and your development time. SPEOS combines lighting performance modeling with extensive, dedicated libraries and optimization capabilities. With SPEOS, you can study the interactions of photons with mechanical geometries to quickly create a functional illumination system for your product. It is a perfect tools for designing, validate and optimize performance of automotive lighting systems, aerospace and deference optic systems, optical sensor test for AV/ADAS and general lightings.

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