Known Issues

If NetLogo malfunctions, please send us a bug report. See the "Contact Us" section for instructions.

Known bugs (all systems)

• The "Turtle Sizes" and "Exact Turtle Positions" features can cause display anomalies under some circumstances
• Integers in NetLogo cannot be larger than +/- 2 ^ 31, and if you exceed this range, instead of a runtime error occurring, you get incorrect results
• On some Java virtual machines, when you print the Interface tab, there may be pieces missing and/or extra artifacts
• Out-of-memory conditions are not handled gracefully

Macintosh-only bugs

• The "Help" menu has an extra blank item in it
• When running in Classic under versions of Mac OS X prior to 10.2, the "User Manual" item on the Help menu will launch a Classic browser instead of a native browser unless a native browser is already running

Linux/UNIX-only bugs

• Resizing and moving of items in the Interface tab may function erratically on some systems
• Saved applets may not work correctly in Netscape version 4

Planned features

This is a partial list of features we are working on currently. We plan to continue to improve NetLogo. Periodically, new versions will be available from our web site.

• Java API for user-defined extensions to NetLogo
• Improved engine so models run faster
• Optional randomized agent scheduler
• Adjusting the execution speed of a model as it runs (without adding a slider and modifying your code)
• Ability to have multiple models open
• Making a QuickTime movie of your model
• Improved support for HubNet
• Native Mac OS X support (note: we already run well under OS X in Classic mode)

Unimplemented StarLogoT primitives

The following StarLogoT primitives are not available in NetLogo. (Note that many StarLogoT primitives, such as count-turtles-with, are intentionally not included in this list because NetLogo allows for the same functionality with the new agentset syntax.)

• ifelse-report
• maxint, minint, maxnum, minnum
• import-turtles, import-patches, import-turtles-and-patches (note that NetLogo adds import-world, though)
• beep, get-date-and-time, readlist, yes-or-no
• miscellaneous seldom-used plotting reporters such as plot-pencolor, pp-plotlist, pp-plotpointlist, ppinterval, ppxcor, ppycor, etc.
• bit, bitand, bitneg, bitor, bitset, bitstring, bitxor, make-bitarray, rotate-left, rotate-right, shift-left, shift-right
• random-exponential, random-exponential-list, random-normal, random-normal-list, random-poisson, random-poisson-list, random-uniform, random-uniform-list, distribute-random-exponential, distribute-random-poisson
• close-movie, open-movie/setup-movie, movie-snapshot, snapshot
• load-pict, save-pict
• camera-brightness, camera-click, camera-init, camera-set-brightness
• choose-directory-dialog, choose-file-dialog, choose-new-file-dialog, netlogo-directory, project-directory, project-name, project-pathname, save-project