Options | Description |
-aas | start Fluent in server mode |
-act | load ACT Start page |
affinity=<x> | set processor affinity; <x>={core | sock | off} |
-app | launches the Remote Visualization Client |
-appscript=<scriptfile> | run the specified script in App |
-case <file_path> [-data] | reads the case file immediately after Fluent launches; can include the data file if it shares the same name as the case file |
-cflush | flush the file cache buffer |
-cnf=<x> | specify the hosts file |
-command=”<TUI command>” | run TUI command on startup, |
-driver <name> | sets the graphics driver; <name>={opengl | opengl2 | x11 | null} |
-env | show environment variables |
-g | run without GUI or graphics |
-gpgpu=<n> | specify number of GPGPUs per machine |
-gpu[=<n>] | run with GPU Solver, and specify devices to use as needed (where <n> is a comma-separated list of devices) |
-gr | run without graphics |
-gu | run without GUI |
-gui_machine=<hostname> | specify the machine to be used for running graphics-related process |
-h<heap_size> | specify heap size for Cortex |
-help | this listing |
-host_ip=<host:ip> | specify the ip interface to be used by the host process |
-i <journal> | read the specified journal file |
-license=<x> | specify the license capability; <x>={enterprise | premium} |
-meshing | run Fluent in meshing mode |
-mpi=<mpi> | specify MPI implementation; <mpi>={openmpi | intel | …}, |
-mpitest | run the mpitest program instead of Fluent to test the network |
-nm | don’t display mesh after reading |
-pcheck | check the network connections before spawning compute node processes |
-platform=intel | use AVX2 optimized binary; This option is for processors that can support AVX2 instruction set |
-post | run a post-processing-only executable |
-prepost | run a pre/post-processing-only executable |
-p<ic> | specify interconnect; <ic>={default | eth | ib}, |
-r | list all releases |
-r<x> | specify release <x> |
ANSYS Fluent
Software Rendering Mode for Fluent Launcher
When running Fluent from inside ANSYS Workbench on Linux. Hardware graphics rendering can fail and the Fluent application failed to start. This error can sometimes be prevented by switching to the software rendering mode. There are 2 approaches
Before Running Workbench, you may want to put this in your BASH Shell
% export HOOPS_PICTURE=x11/lin
In C Shell
% setenv HOOPS_PICTURE x11/lin
If you are using Fluent Launcher
Steps:
Open a Fluent set of cells
Right Click the Fluent setup cell and choose, edit
In the resulting Fluent launcher, choose +, Show More Options
Select the Environment tab
Add the following entry
HOOPS_PICTURE=x11/lin
Licensing error while opening ANSYS Fluent Meshing
The usage of Fluent was smooth. But when I launched the Fluent (Fluent with Meshing)
I’ve got this error. “No license is available at this time”
Taking a look at ANSYS Learning Forum, According to the forum (Licensing error while opening ANSYS Mechanical) “That error message would appear when there is another operation going on that won’t allow the license to be shared , such as meshing or solving, etc.”
To resolve the issue:
- Execute the command “/usr/local/ansys_inc/v195/commonfiles/tools/linx64/ansyslm_relutil -userprefs
You should see the dialog box.
You have to go to the bottom of the dialog box “When using Workbench, would you like to”, Use a separate license for each application
Finally, close the application and restart. The issue should go away.
References:
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.