Do you have a roadmap or a schedule of releases?

No, we don't have any schedule of releases. Neverthless, we continue releasing maintenance updates of GP 2.0 and continue development of the next major feature release GanttProject 2.1. Please read plans for GanttProject 2.1

Is it possible to use hours as task duration?

This feature will appear in GanttProject 2.1. You can download an experimental unstable milestone build GanttProject 2.1 M2 and play with hours right now

When I try to print or preview my project, I receive "OutOfMemory" error. But I have 2G RAM on my computer! What shall I do?

It doesn't really matter how much RAM is physically installed. What does matter is how much memory Java VM is allowed to use. You can give it more memory if you modify a startup script, which is called ganttproject.bat on Windows, ganttproject.sh on Unix and ganttproject.command on MacOSX (all three are available in our ZIP distribution). Open the script in your favorite text editor and replace -Xmx256m with some bigger number, e.g. -Xmx512m. Please note that your change will take effect only if you start GanttProject using the script (that is, ganttproject.exe which you usually start from your Start menu on Windows or GanttProject.app which is usually used by MacOSX users will not be aware of your change).

You may also consider zooming out and preview/print using smaller zoom factor.

Is it possible to change weekend days?

You can setup weekend days when you create a new project. If you have already created a big project and discovered that weekend days are not those you wished, you may create a new project and import data from the old one.

Is it possible to render weekends but don't really treat them as holidays?

No, it is impossible in the current version. This feature is planned for GanttProject 2.1

How can I become a member of GanttProject team?

Please start with submitting patches to our patch tracker Optionally, you may write an email to the team leaders. When few patches are accepted and both you and we are interested in the collaboration, we will add you to the development team

How can I translate GanttProject interface to my language?

Translation process is described on our wiki pages