Cadence® system design and verification solutions, integrated under our Verification Suite, provide the simulation, acceleration, emulation, and management capabilities.
Verification Suite Related Products A-Z
Cadence® digital design and signoff solutions provide a fast path to design closure and better predictability, helping you meet your power, performance, and area (PPA) targets.
Full-Flow Digital Solution Related Products A-Z
Cadence® custom, analog, and RF design solutions can help you save time by automating many routine tasks, from block-level and mixed-signal simulation to routing and library characterization.
Overview Related Products A-Z
Driving efficiency and accuracy in advanced packaging, system planning, and multi-fabric interoperability, Cadence® package implementation products deliver the automation and accuracy.
Cadence® PCB design solutions enable shorter, more predictable design cycles with greater integration of component design and system-level simulation for a constraint-driven flow.
An open IP platform for you to customize your app-driven SoC design.
Comprehensive solutions and methodologies.
Helping you meet your broader business goals.
A global customer support infrastructure with around-the-clock help.
More Support Log In
24/7 Support - Cadence Online Support
Locate the latest software updates, service request, technical documentation, solutions and more in your personalized environment.
Cadence offers various software services for download. This page describes our offerings, including the Allegro FREE Physical Viewer.
The Cadence Academic Network helps build strong relationships between academia and industry, and promotes the proliferation of leading-edge technologies and methodologies at universities renowned for their engineering and design excellence.
Participate in CDNLive
A huge knowledge exchange platform for academia to network with industry. We are looking for academic speakers to talk about their research to the industry attendees at the Academic Track at CDNLive EMEA and Silicon Valley.
Come & Meet Us @ Events
A huge knowledge exchange platform for academia. We are looking for academic speakers to talk about their research to industry attendees.
Americas University Software Program
Join the 250+ qualified Americas member universities who have already incorporated Cadence EDA software into their classrooms and academic research projects.
EMEA University Software Program
In EMEA, Cadence works with EUROPRACTICE to ensure cost-effective availability of our extensive electronic design automation (EDA) tools for non-commercial activities.
Apply Now For Jobs
If you are a recent college graduate or a student looking for internship. Visit our exclusive job search page for interns and recent college graduate jobs.
Cadence is a Great Place to do great work
Learn more about our internship program and visit our careers page to do meaningful work and make a great impact.
Get the most out of your investment in Cadence technologies through a wide range of training offerings.
Overview All Courses Asia Pacific EMEANorth America
Instructor-led training [ILT] are live classes that are offered in our state-of-the-art classrooms at our worldwide training centers, at your site, or as a Virtual classroom.
Online Training is delivered over the web to let you proceed at your own pace, anytime and anywhere.
Exchange ideas, news, technical information, and best practices.
The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information.
It's not all about the technology. Here we exchange ideas on the Cadence Academic Network and other subjects of general interest.
Cadence is a leading provider of system design tools, software, IP, and services.
This has been a widespread problem at my University for some time now. Sometimes everything works fine with simulations. Other times (apparently at random) Spectre simulations will not work when started through the Analog Environment. When it starts to fail, it generally will continue to do so for a long period and restarting Cadence does not help. If I try again the next day sometimes it will work, other times it won't. When it fails to run, the spectre.out window displays a message similar to "Simulation failed. See output.log file for more information." However, this file is not created.
When this happens we use a workaround to run simulations: Using the console, we browse to the simulation/Design_Name/spectre/schematic directory and run the Spectre command from the command line, using the command that has been set up in ADE. This always works, and the results can be loaded into ADE and analyzed as usual. The problem with this workaround, other than being a hassle, is that there is no way to run parametric simulations (as far as I can figure out).
Versions being used are:ICFB/ADE 22.214.171.1240.5.128Spectre 126.96.36.1990
Our servers are Sun machines.The problem seems to be independent of design kits, and will even appear for the simplest circuits (eg. a voltage source, resistor and ground from analogLib).
Any ideas would be greatly appreciated.
The first thing that caught my eye was the version of spectre that you are using....MMSIM 6.2.1 has been End of Life for some time now. I strongly recommend upgrading to MMSIM 7.1.1 if at all possible.
It would also be helpful to get the exact error message from spectre/IC5.1.41 .
I recommend filing a Service Request via sourcelink.cadence.com and the support AE on line will be able to assist you in troubleshooting.
Customer Support Director - Analog/Mixed-Signal/RF AEs
Cadence Design Systems, Inc.
In reply to Tawna:
Thanks for the reply. I'll see if we can get the newer MMSIM installed.
For the record, the exact error message is:
during simulation.Use the
Simulation->Output Log menu for more information.”
'Simulation->Output Log' option is greyed out, and the log file does not exist
in the simulation directory. I can't find anything that provides any information about the error.
I'm not sure if our University licensing agreement includes access to support from Cadence AE's. I can look into it if the Spectre update doesn't fix the problem.
In reply to IronRing:
As advised, upgrade your MMSIM to the latest hotfix. Check with your foundry pdk documentation what version of MMSIM, IC, ASSURA, etc... the foundry used to validate the pdk before simulating and try to stick with those versions.
I see this problem sometimes but it seems to be specific to certain machines (Netlist & Run, no output log and spectre stalls, after a minute icfb reports problem). We have a UNIX lab running Solaris 10 and sometimes the error is resolved by simply going to another workstation and running the simulation.
In reply to tkhan:
This is a well known problem. The problem is due to missing OS patches. You have to run checkSysConf on problematic machines and get those patches installed/upgraded.
%> checkSysConf MMSIM7.1
This will check for OS patches and report the missing ones. Pass the report to IT and get them installed. That should fix the problem.
Thank you Ramkumar! I ran checkSysConf MMSIM6.2 and it comes up with various patches that need to be applied. Hopefully IT will be able to apply these patches to fix the problem.