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Latency to Connect License server

Tarique mohd

When I try to run simulation , though the simulation is completed but there is latency to find the license server  and wait time is quite substantial

--- Network Latency Test ---
Description: To determine the license checkout performance on a feature by
feature basis and across each server.
CDS_LIC_FILE: 27012@flexserv1.tudelft.nl
Test started at 07/16/2025 17:24:19
FEATURE: 32500 VERSION: 10.100
27012@flexserv1.tudelft.nl
--------------------------------------------------------------------------------
Attempting to check out feature '32500' version 10.100 from license server 27012@flexserv1.tudelft.nl at 07/16/2025 17:24:19
Checkout failed at 07/16/2025 17:24:19 ( 0 second ) ( ERROR )
Ping time to license server machine 'flexserv1.tudelft.nl': 0.421 ms
ERROR (LMF-02005): License call failed for feature 32500, version 10.100 and quantity 1. The license server search path is defined as 27012@flexserv1.tudelft.nl. The FLEXnet error message is as follows,
FLEXnet ERROR(-5, 0, 0): No such feature exists.
Run 'lic_error LMF-02005' for more information.
------------------------------------
--------------------------------------------
Test completed at 07/16/2025 17:24:19

  • I'm not sure what you're checking there because you appear to be checking for an obsolete license version, and the time shown in that log has no difference between the test start and end times, so presumably it's less than one second?

    In general, I would suggest that you:

    1. setenv CDS_LIC_ONLY  (this means that it will not look at $LM_LICENSE_FILE as well as $CDS_LIC_FILE), which cuts down the possible license servers
    2. Run "spectre +lorder MMSIM" (if you have the multi-mode simulation - i.e. the Virtuoso_Multi_mode_Simulation license feature). This will stop it trying to check for the specific individual product licenses first, and if you have multiple license servers it might be checking them all for a failure

    Andrew

  • in reply to Andrew Beckett

    1) Thank you Andrew , I have used this one line command 

    setenv CDS_LIC_ONLY 

    on the top of my source me file 

    that worked.

    But I am bit curious , is that mean there is no use of  $LM_LICENSE_FILE as well as $CDS_LIC_FILE?

    2) we have  multi-mode simulation - i.e. the Virtuoso_Multi_mode_Simulation license feature, could you please elaborate  how I can use it?

  • in reply to Tarique mohd

    Hi Tarique,

    You will still need LM_LICENSE_FILE for using any non-Cadence applications. By setting the variable CDS_LIC_ONLY, Cadence applications will check the license servers defined in CDS_LIC_FILE only (by default, both CDS_LIC_FILE and LM_LICENSE_FILE are read). 

    The argument "+lorder MMSIM" suggested by Andrew does precisely what you asked for. It will instruct Spectre to look for Virtuoso_Multi_mode_Simulation licenses and skip looking for any other individual product licenses.

    Regards,
    Saloni

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