# Contacting Us

NetLogo 5.0.3 User Manual

Feedback from users is essential to us in designing and improving NetLogo. We'd like to hear from you.

## Web site

Our web site at ccl.northwestern.edu includes our mailing address and phone number. It also has information about our staff and our various research activities.

## Feedback, questions, etc.

For help using NetLogo, try this group: http://groups.yahoo.com/group/netlogo-users/.

If you have feedback, suggestions, or questions, you may write us at feedback@ccl.northwestern.edu.

## Reporting bugs

Our public bug tracker is on GitHub at https://github.com/NetLogo/NetLogo/issues. You can look here to report a new bug, check if a bug has already been reported, and so on.

When submitting a bug report, please try to include as much of the following information as possible:

- A complete description of the problem and how it occurred.
- The NetLogo model or code you are having trouble with. If possible, attach a complete model. (It's best if you can reduce the amount of code in the model to the minimum necessary to demonstrate the bug.)
- Your system information: NetLogo version, OS version, Java version, and so on. This information is available from NetLogo's "About NetLogo" menu item, then clicking the System tab. In applets, the same information is available by right-clicking the white background of the applet.
- Any error messages that were displayed. Please copy and paste the entire error message into your email, or make a screen capture if you are unable to copy and paste.

We also accept bug reports by email at bugs@ccl.northwestern.edu.

## Open source

NetLogo is free, open source software. The source code is hosted at https://github.com/NetLogo/NetLogo. Contributions from interested users are welcome.

For discussion of NetLogo API's and the development of NetLogo itself, try http://groups.google.com/group/netlogo-devel.