Run-time memory allocation error with 40GB RAM

juanmariacg · October 11, 2012, 08:52

Hi everybody,

I need your help please!

I'm trying to run an CFX simulation and I always received this:

+--------------------------------------------------------------------+
| Memory Allocated for Run (Actual usage may be less) |
+--------------------------------------------------------------------+

Data Type Kwords Words/Node Words/Elem Kbytes Bytes/Node

Real 1527918.2 453.00 82.17 5968430.5 1812.02
Integer 583426.2 172.98 31.38 2279008.8 691.91
Character 5089.8 1.51 0.27 4970.5 1.51
Logical 96.0 0.03 0.01 375.0 0.11
Double 729.6 0.22 0.04 5700.0 1.73

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| *** Run-time memory allocation error *** |
| Not enough free memory is currently available on the system. |
| Could not allocate requested memory - exiting! |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX solver exited with return code 2. No results file |
| has been created. |
+--------------------------------------------------------------------+

I know that is a very common issue, but I've red a lot and I don't got it!.

I have 40 GB that should be enoguh, shouldn't be?

thank you in advance!!!

monkey1 · October 11, 2012, 11:01

You have 40 GB of RAM????
Or do you mean Disk Space....
The Memory meant by ANSYS is RAM and not Hard Disk Space...so if you have less than approx. >9GB of RAM it won't work.

juanmariacg · October 11, 2012, 11:08

thank you!

I mean 40GB or RAM; I had 8GB and I've installed 32GB more.

strobel · October 11, 2012, 16:58

Your mesh have high Refinement? maybe your mesh have too many elements per quad.

cdegroot · October 12, 2012, 09:51

Must be something else going on. Based on the memory allocated table you posted it seems like it is only trying to allocate a bit more than 8GB. So unless you have a lot of other things running, you should have plenty of RAM.

sakurabogoda · October 13, 2012, 04:31

Are you dealing with steady state or Transient State?

juanmariacg · October 24, 2012, 07:24

I am dealing with steady state,

thank you to everyone

strobel · October 24, 2012, 13:53

try change memory allocated factor.

Mandeep · October 24, 2012, 16:58

I guess mesh is highly refined so try to have mapped mesh or do not use parallel computing

Quote:

Originally Posted by juanmariacg

Hi everybody,

I need your help please!

I'm trying to run an CFX simulation and I always received this:

+--------------------------------------------------------------------+
| Memory Allocated for Run (Actual usage may be less) |
+--------------------------------------------------------------------+

Data Type Kwords Words/Node Words/Elem Kbytes Bytes/Node

Real 1527918.2 453.00 82.17 5968430.5 1812.02
Integer 583426.2 172.98 31.38 2279008.8 691.91
Character 5089.8 1.51 0.27 4970.5 1.51
Logical 96.0 0.03 0.01 375.0 0.11
Double 729.6 0.22 0.04 5700.0 1.73

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| *** Run-time memory allocation error *** |
| Not enough free memory is currently available on the system. |
| Could not allocate requested memory - exiting! |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX solver exited with return code 2. No results file |
| has been created. |
+--------------------------------------------------------------------+

I know that is a very common issue, but I've red a lot and I don't got it!.

I have 40 GB that should be enoguh, shouldn't be?

thank you in advance!!!

DarylMusashi · October 25, 2012, 04:11

Hello,

which operating system do you use?

Windows 7 (32 bit) and Windows Vista (32 bit) are able to handle only 4 GB RAM.
2 of these 4 GB RAM can be used for applications. So your 40 GB RAM are worthless, if you use Windows Vista, 7 (or even XP).

If you use Windows:
What you can try is the CFF explorer suite. With this tool you can manipulate program files and allow them to allocate more then 2 GB RAM. Load the particular program file, edit the file header characteristics and enable the option "app can handle > 2 GB of adress space" (see attachment).
You should do a backup copy of your program file before!

If it still does not work - as mentioned before - you can try to play with the solver's memory allocation factor in CFX.

Hope that helps,
Daryl Musashi

ghorrocks · October 25, 2012, 06:59

I do not think Daryl's trick will allow you to access >2GB. The CFX code will not have been written to support this so it will not work.

Your choices are:
* Use distributed parallel to split it up over many machines
* Use local parallel to split it up to many processes on the local machine where each process is less than 2GB.
* Move to a 64 bit OS with 64 bit CFX.
* Use a coarser mesh.

October 11, 2012, 08:52	Run-time memory allocation error with 40GB RAM	#1
juanmariacg New Member Juan Campos Join Date: Oct 2010 Posts: 12 Rep Power: 16	Hi everybody, I need your help please! I'm trying to run an CFX simulation and I always received this: +--------------------------------------------------------------------+ \| Memory Allocated for Run (Actual usage may be less) \| +--------------------------------------------------------------------+ Data Type Kwords Words/Node Words/Elem Kbytes Bytes/Node Real 1527918.2 453.00 82.17 5968430.5 1812.02 Integer 583426.2 172.98 31.38 2279008.8 691.91 Character 5089.8 1.51 0.27 4970.5 1.51 Logical 96.0 0.03 0.01 375.0 0.11 Double 729.6 0.22 0.04 5700.0 1.73 +--------------------------------------------------------------------+ \| ERROR #001100279 has occurred in subroutine ErrAction. \| \| Message: \| \| * Run-time memory allocation error * \| \| Not enough free memory is currently available on the system. \| \| Could not allocate requested memory - exiting! \| \| \| \| \| \| \| +--------------------------------------------------------------------+ +--------------------------------------------------------------------+ \| An error has occurred in cfx5solve: \| \| \| \| The ANSYS CFX solver exited with return code 2. No results file \| \| has been created. \| +--------------------------------------------------------------------+ I know that is a very common issue, but I've red a lot and I don't got it!. I have 40 GB that should be enoguh, shouldn't be? thank you in advance!!!

October 25, 2012, 04:11		#10
DarylMusashi Senior Member Holger Dietrich Join Date: Apr 2011 Location: Germany Posts: 174 Rep Power: 15	Hello, which operating system do you use? Windows 7 (32 bit) and Windows Vista (32 bit) are able to handle only 4 GB RAM. 2 of these 4 GB RAM can be used for applications. So your 40 GB RAM are worthless, if you use Windows Vista, 7 (or even XP). If you use Windows: What you can try is the CFF explorer suite. With this tool you can manipulate program files and allow them to allocate more then 2 GB RAM. Load the particular program file, edit the file header characteristics and enable the option "app can handle > 2 GB of adress space" (see attachment). You should do a backup copy of your program file before! If it still does not work - as mentioned before - you can try to play with the solver's memory allocation factor in CFX. Hope that helps, Daryl Musashi Last edited by DarylMusashi; November 9, 2015 at 17:20.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Extrusion with OpenFoam problem No. Iterations 0	Lord Kelvin	OpenFOAM Running, Solving & CFD	8	March 28, 2016 12:08
How to write k and epsilon before the abnormal end	xiuying	OpenFOAM Running, Solving & CFD	8	August 27, 2013 16:33
calculation diverge after continue to run	zhajingjing	OpenFOAM	0	April 28, 2010 05:35
RAM memory problem	alpha	Main CFD Forum	8	February 12, 2008 12:07
AMG versus ICCG	msrinath80	OpenFOAM Running, Solving & CFD	2	November 7, 2006 16:15

October 11, 2012, 11:01		#2
monkey1 Senior Member Join Date: Jul 2011 Location: Berlin, Germany Posts: 173 Rep Power: 15	You have 40 GB of RAM???? Or do you mean Disk Space.... The Memory meant by ANSYS is RAM and not Hard Disk Space...so if you have less than approx. >9GB of RAM it won't work.

October 11, 2012, 11:08		#3
juanmariacg New Member Juan Campos Join Date: Oct 2010 Posts: 12 Rep Power: 16	thank you! I mean 40GB or RAM; I had 8GB and I've installed 32GB more.

October 11, 2012, 16:58		#4
strobel Member Paulo Join Date: Jun 2011 Posts: 34 Rep Power: 15	Your mesh have high Refinement? maybe your mesh have too many elements per quad.

October 12, 2012, 09:51		#5
cdegroot Senior Member Chris DeGroot Join Date: Nov 2011 Location: Canada Posts: 414 Rep Power: 18	Must be something else going on. Based on the memory allocated table you posted it seems like it is only trying to allocate a bit more than 8GB. So unless you have a lot of other things running, you should have plenty of RAM.

October 13, 2012, 04:31		#6
sakurabogoda Senior Member S.Bogoda Join Date: Jul 2012 Posts: 133 Rep Power: 14	Are you dealing with steady state or Transient State?

October 24, 2012, 07:24		#7
juanmariacg New Member Juan Campos Join Date: Oct 2010 Posts: 12 Rep Power: 16	I am dealing with steady state, thank you to everyone

October 24, 2012, 13:53		#8
strobel Member Paulo Join Date: Jun 2011 Posts: 34 Rep Power: 15	try change memory allocated factor.

October 25, 2012, 06:59		#11
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	I do not think Daryl's trick will allow you to access >2GB. The CFX code will not have been written to support this so it will not work. Your choices are: * Use distributed parallel to split it up over many machines * Use local parallel to split it up to many processes on the local machine where each process is less than 2GB. * Move to a 64 bit OS with 64 bit CFX. * Use a coarser mesh.