MATLAB: Is the options file being ignored after using lmreread

MATLAB

I am using an options file with my network license which contains GROUP entires. After doing a reread (either from lmtools.exe or the command line), it appears that the rules I've listed in my options file no longer apply. How do I fix this?

Best Answer

The lmreread utility causes the license server manager to reread the license file and start any new vendor daemons that have been added. In addition, all currently running vendor daemons are signaled to reread the license file and their options files for changes. If report logging is enabled, any report log data still in the vendor daemon’s internal data buffer is flushed. lmreread recognizes changes to system host names, but cannot be used to change server TCP/IP port numbers or update license files.

The lmreread utility will not work with Network Named User licensing only Concurrent licenses.

Related Solutions

MATLAB: How to switch MATLAB from a Concurrent or Network Named User license to an Individual or Designated Computer license

When switching from a Concurrent or Network Named User license to an Individual or Designated Computer license, can choose to keep access to your Concurrent or Network Named User license for the purposes of accessing additional toolboxes. (Your MATLAB seat must come from the Individual or Designated Computer license.)

Keep using toolboxes on the Concurrent or Network Named User license

If you would like to launch MATLAB using an Individual or Designated Computer license and use additional toolboxes from a Concurrent or Network Named User license, you will need to activate MATLAB to both licenses. To activate the Individual or Designated Computer license:

Start MATLAB
Click on the Help menu
Click on Licensing
Select "Activate Software"
Restart MATLAB

After restarting MATLAB, your ver output will display the new Individual or Designated Computer license. Any toolboxes you have installed which are not on the Individual or Designated Computer license will continue to draw licenses from the Concurrent or Network Named User license.

Stop using toolboxes on the Concurrent or Network Named User license

If you want to stop using the Concurrent or Network Named User license, you'll need to remove the license information for that license from your machine after activating the Individual or Designated Computer license per the above steps. Concurrent or Network Named User license information can be stored in a network license file or in an environment variable. To find your network license file see the following article:

Where are the license files for MATLAB located?

To identify environment variables which contain MATLAB license information, see the following article:

What are the LM_LICENSE_FILE and MLM_LICENSE_FILE environment variables and how do I set or check for them?

MATLAB: How to prevent users from running lmdown, lmremove, or lmreread from a client machine

By default, the usage of lmdown, lmremove and lmreread can be performed by any user with access to the network license manager. To restrict these functions see the information below:

On Windows, the lmtools.exe utility contains options to prevents users from stopping the license manager, removing licenses, or rereading the license.dat and options files. These options can be accessed by following these steps:

1. Launch $MATLAB\etc\win{32|64}\lmtools.exe. ($MATLAB\flexlm for releases prior to 2010b

2. Choose the "Start/Stop/Reread" tab.

3. Click the Advanced settings button to expand the options.

NOTE: $MATLAB refers to the installation folder for MATLAB on the license manager.

Under Start Server Options there are three checkboxes which can be checked to prevent lmdown from being run on any machine other than the one running the license manager, disable lmdown or lmreread.

For a Unix/Linux/Mac system there are command line switches to prevent access to lmdown, lmremove and lmreread. To use these switches, the license manager must be started with the lmgrd binary directly. You will not be able to use lmstart or lmboot to make these changes. To start the license manager with lmgrd, you must use the following command:

 $MATLAB/etc/$ARCH/lmgrd - c <path to license file> -l <path to log>

- $MATLAB refers to the installation folder for MATLAB on the license manager

- $ARCH refers to the folder for the architecture you are using (Ex: glnx86, glnxa64, maci, sol, etc.)

- "path to license file" refers to the path of the license file on the computer

- "path to log" refers to the path of the log file that will be written (The default log is /var/tmp/lm_TMW.log)

For example, to start the license manager on 64-bit Linux:

 /usr/local/matlab/etc/glnxa64/lmgrd - c /usr/local/matlab/etc/license.dat -l /var/tmp/lm_TMW.log

Once you change the method of starting the license manager, you can use the following flags with lmgrd to restrict usage:

-x lmremove: Disables lmremove function

-x lmdown: Disables lmdown completely (license manager process must be killed manually)

-local: Restricts access to lmdown to the computer where lmgrd is Running

-2 -p: The -2 -p switch restricts usage of lmdown, lmreread, and lmremove to a FLEXlm administrator who is by default root.

For the -2-p option, if there a UNIX group called lmadmin, then usage is restricted to only members of that group. If root is not a member of this group, then root does not have permission to use any of the above utilities. With this configuration, users attempting to change the license manager who are not part of the lmadmin group will receive the following error message:

Shutdown failed: You are not a license administrator (-63,214)

Best Answer

Related Solutions

MATLAB: How to switch MATLAB from a Concurrent or Network Named User license to an Individual or Designated Computer license

MATLAB: How to prevent users from running lmdown, lmremove, or lmreread from a client machine

Related Question