Vensim 6.4 Released.

Get It

Vensim 6.4 is available for download or purchase in the Vensim Store .

Upgrades are easy – just visit the download page and enter your license key information.

  • If your maintenance is current, you can download immediately.
  • If you don’t have a current license, you can extend your maintenance easily – just follow the Upgrade link that will be generated.
  • Can’t find your license? Need other options? No problem – contact sales at vensim@vensim.com for help, volume quotes and other information.

PLE is always free for noncommercial use, and the Model Reader is free for redistribution of any model.

What’s New?

Optimization improvements
o All optimization settings, including MCMC, stochastic optimization and extended payoff types are now available directly from the user interface. See the sections on Payoff Definitions and Optimization for more details.
o Payoff reports have been improved
o A new payoff type permits elements that contribute to Kalman filter updates but not to the optimization payoff
o Payoffs now skip points with NA values of model variables
o Minor bug fix to prevent randomization of MCMC internal processes
o Faster payoff computation
o Kalman filter stability has been improved, particularly for models with many measurements and few states
Sensitivity simulation improvements
o The VECTOR distribution has new options for testing only endpoints
o Improved distribution parameter validation
o Enhanced data export – see next item.
Data import/export – new functionality makes it easier to work with enterprise data sources, statistics, visualization and business intelligence packages
o Vensim can now import and export two new data types, relational and tidy. See: VDF2DLIST, VDF2TIDY, DLIST2VDF, TIDY2VDF
o Sensitivity simulation export has been greatly enhanced, and also includes tidy and relational formats – see SENS2FILE
The Runs Compare tool can now be used with non-simulation sources (i.e. .vdf files from data)
Many bug fixes on the Mac.

 

 

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