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.
I'm a reasonably proficcient skill/ocean user, but have not worked with oceanXL before. I'm trying to create a monte-carlo script with oceanXL which will run a certain monte-seed, update some parameters, then re-run the same seed. Should be easy.... as a first step, I exported an ocean script (FILE--> Save Script) from a working ADEXL Monte-Carlo simulation. The script looks complete and has no obvious errors. The last line in the script is:
ocnxlRun( ?mode 'monteCarlo ?nominalCornerEnabled t ?allCornersEnabled t ?allSweepsEnabled t)
This always errors-out with:
*Error* return: return can only be used within a prog
version 6.1.5-64b.500.17 (using GXL license for XL)
The best thing is to contact customer support over this. I've not seen this before. You might get a bit more info by doing:
before loading the script. But even then, it will probably need support input.
In reply to Andrew Beckett:
I've opened a support ticket.
Also some more info: I created a simple circuit with an ideal voltage source, gnd, and resistor. Another non-ideal resistor forms a voltage divider such that the midpoint varies with monte-carlo analysis. Same symptom: I can run just fine through the GUI, but not with ocnxl. Auto-generated script is included below for 10x monte runs (model file path removed for IP reasons)
(EDIT: unix2dos fix)
;---------- Test "drm_test:junk3:1" -------------
ocnxlBeginTest("drm_test:junk3:1")simulator( 'spectre )
design( "drm_test" "junk3" "schematic")modelFile(
analysis('dc ?saveOppoint t ?param "temp" ?start "-40"
?stop "125" ?lin "10" )
saveOption( 'currents "selected" )
saveOption( 'save "selected" )
save( 'v "/vmid" )temp( -40.0 )
ocnxlOutputSignal( "/vmid" ?save t)
ocnxlEndTest() ; "drm_test:junk3:1"
;====================== Sweeps setup ===========================================
;====================== Model Group setup ==========================================
;====================== Corners setup ==========================================
;====================== Job setup ==============================================
"name" "ADE XL Default"
;====================== Disabled items =========================================
;====================== Run Mode Options ======================================
ocnxlSweepsAndCornersOptions( ?submitpointsenabled "0" )ocnxlMonteCarloOptions( ?mcMethod "all" ?mcNumPoints "10" ?mcNumBins "" ?mcStopEarly "0" ?mcYieldTarget "99.73" ?mcYieldAlphaLimit "0.05" ?samplingMode "random" ?saveProcess "1" ?saveMismatch "0" ?useReference "0" ?donominal "1" ?saveAllPlots "1" ?monteCarloSeed "1" ?mcStartingRunNumber "" )
;====================== Starting Point Info ======================================
;====================== Run command ============================================ocnxlRun( ?mode 'monteCarlo ?nominalCornerEnabled t ?allCornersEnabled t ?allSweepsEnabled t)
ocnxlOutputSummary(?yieldSummary t ?exprSummary nil ?specSummary nil ?detailed nil)
;====================== End XL Mode command ===================================ocnxlEndXLMode()
In reply to RFdog:
If you've opened a Case with Customer Support, please work with the AE assigned to you.
(It's not a good use of resources to have multiple people working in parallel on the same issue...particularly when they don't know and cannot collaborate.)
Customer Support Director - Analog/Mixed-Signal/RF AEs
Cadence Design Systems, Inc.
In reply to Tawna:
So here's the solution:
The problem is related to a (now) known bug where ADEXL doesn't clear completely even when you "close data". This was hitting me since I was running the script from the CIW window in the same cadence session as I had previously saved the script from.
If I modify the script to open the cellview in read mode and *also* run the script only from a clean / new cadence session then the error goes away.
To open in read-mode: