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A common question arises when managing a license server. Should I use lmreread to pick up changes in the license file or options file or should use lmdown and then restart the license server?


Over the years, I've found that lmreread generally works well for adding new licenses or for picking up simple changes to the options file such as defining a new LM_PROJECT.


However, for swapping complete license files or for changes to the options file that involve restricting access to licenses (e.g.: RESERVE), you must be careful with lmreread and should probably opt for a restart. In the case of controlling access with keywords, it's one thing to add a new license and define who can check it out with INCLUDE. It's another thing to remove access for a user or host that already has that license checked out. Scheduling a restart can help mitigate problems.


What are your experiences? Please feel free to share your best practices.

In most Mentor Graphics PCB releases, the MSVC++ Redistributable software is installed every time you install software. It's useful in the cases where you install new releases, but its not always necessary when re-installing the same release or applying updates.


Setting the environment variable SDD_SKIPCORECOMP=1 before installation prevents the installation of these packages, and can save you a bit of time during installation. It's especially useful when you are installing a source tree for client/server installation on Windows. If the server is not used to run the applications, there is no need for the SDD core components.


Use this with caution! It will prevent the packages from being installed in if set, and you do need those packages to run the applications or if you are re-installing to repair a corrupted software installation.



System Restore's job is to keep notes of everything you change on your computer, enabling you to reverse them with a couple of clicks.

On Windows 7, right-click Computer, select Properties > System Protection > System Restore > Next, and choose the restore point you'd like to use. Click the new button to 'Scan for affected programs' and Windows will tell you which (if any) programs and drivers will be deleted or recovered by selecting this restore point.

Mentor Graphics applications can sometimes be adversely affected by other programs that are installed and registry settings that get changed. Reversing those changes by returning to a restore point can get Mentor software back up and running.