# GanttProject Desktop Support **URL:** https://help.ganttproject.biz/c/ganttproject-desktop-support/7.md [Latest](https://help.ganttproject.biz/latest.md) · [Categories](https://help.ganttproject.biz/categories.md) · [Tags](https://help.ganttproject.biz/tags.md) --- ## [About the GanttProject Desktop Support category](https://help.ganttproject.biz/t/about-the-ganttproject-desktop-support-category/2062)
**Author:** [@ganttproject](https://help.ganttproject.biz/u/ganttproject)\ **Replies:** 0\ **Last updated:** [July 18, 2020, 1:17am UTC](https://help.ganttproject.biz/t/about-the-ganttproject-desktop-support-category/2062 "2020-07-18T01:17:27Z")
This is the place where you can get support if you have any troubles with GanttProject Desktop Application. Please start with searching these pages. Create a new topic if you problem is new or just specific to you. Dis… --- ## [READ ME FIRST. FAQ and Search](https://help.ganttproject.biz/t/read-me-first-faq-and-search/8)
**Author:** [@system](https://help.ganttproject.biz/u/system)\ **Replies:** 0\ **Last updated:** [March 6, 2017, 6:45pm UTC](https://help.ganttproject.biz/t/read-me-first-faq-and-search/8 "2017-03-06T18:45:22Z")
You’re welcome to ask any questions about GanttProject here, but we strongly recommend to read the FAQ and search before asking. This may really help you to get the answer faster. Search To search this site, click searc… --- ## [Print crops top and bottom lines](https://help.ganttproject.biz/t/print-crops-top-and-bottom-lines/12442)
**Author:** [@JohnR](https://help.ganttproject.biz/u/JohnR)\ **Replies:** 3\ **Last updated:** [October 28, 2026, 10:46am UTC](https://help.ganttproject.biz/t/print-crops-top-and-bottom-lines/12442 "2026-10-28T10:46:32Z")
Print from gantt chart view has very small top and bottom margins that crops the content (half the “week” line and half of the bottom-most task). Content is otherwise OK. Using Win11, A4, print all pages. --- ## [Find previous version gan file](https://help.ganttproject.biz/t/find-previous-version-gan-file/12441)
**Author:** [@Christian\_Tarky](https://help.ganttproject.biz/u/Christian_Tarky)\ **Replies:** 1\ **Last updated:** [October 22, 2026, 11:30pm UTC](https://help.ganttproject.biz/t/find-previous-version-gan-file/12441 "2026-10-22T23:30:33Z")
I rename my gan project in my laptop. i want to find the previous version --- ## [Schedule not updated after changing dates](https://help.ganttproject.biz/t/schedule-not-updated-after-changing-dates/12439)
**Author:** [@SebastienH](https://help.ganttproject.biz/u/SebastienH)\ **Replies:** 1\ **Last updated:** [October 21, 2026, 5:49pm UTC](https://help.ganttproject.biz/t/schedule-not-updated-after-changing-dates/12439 "2026-10-21T17:49:04Z")
When I change a date or a predecessor, the schedule is not affected, and the dates do not propagate. It only works if I save the project and reopen it. Did I miss something? … maybe the beta version !? --- ## [Rescheduling tasks beyond the current date](https://help.ganttproject.biz/t/rescheduling-tasks-beyond-the-current-date/12432)
**Author:** [@Peace\_to\_the\_world](https://help.ganttproject.biz/u/Peace_to_the_world)\ **Replies:** 0\ **Last updated:** [October 10, 2026, 5:39am UTC](https://help.ganttproject.biz/t/rescheduling-tasks-beyond-the-current-date/12432 "2026-10-10T05:39:16Z")
Please implement a feature that automatically moves incomplete tasks to the current date. In other words, completed tasks would remain as they are, while the start date for incomplete tasks would automatically be updated… --- ## [From email: Display resources in the Gantt chart](https://help.ganttproject.biz/t/from-email-display-resources-in-the-gantt-chart/12408)
**Author:** [@DmitryBarashev](https://help.ganttproject.biz/u/DmitryBarashev)\ **Replies:** 0\ **Last updated:** [September 3, 2026, 8:05pm UTC](https://help.ganttproject.biz/t/from-email-display-resources-in-the-gantt-chart/12408 "2026-09-03T20:05:18Z")
From email To get a better overview, I’d like to display these resources in the Gantt chart as well. Unfortunately, I haven’t been able to find a way to do this yet. Could you help me with this? --- ## [Swedish holidays 2026-2030](https://help.ganttproject.biz/t/swedish-holidays-2026-2030/12403)
**Author:** [@hmartinsson](https://help.ganttproject.biz/u/hmartinsson)\ **Replies:** 1\ **Last updated:** [August 25, 2026, 7:04pm UTC](https://help.ganttproject.biz/t/swedish-holidays-2026-2030/12403 "2026-08-25T19:04:16Z")
Here are the Swedish holidays 2026-2030. I hope they can be useful. /Hans \ \ \ **Author:** [@Jorge\_Mariani](https://help.ganttproject.biz/u/Jorge_Mariani)\ **Replies:** 4\ **Last updated:** [August 6, 2026, 4:00pm UTC](https://help.ganttproject.biz/t/how-to-renumber-or-reset-task-ids/12402 "2026-08-06T16:00:10Z") I created a project, added a couple of tasks and then deleted the tasks. Next task I add is n° 3, not 1. --- ## [Resource availability impact on task duration](https://help.ganttproject.biz/t/resource-availability-impact-on-task-duration/12397)
**Author:** [@Bart\_C](https://help.ganttproject.biz/u/Bart_C)\ **Replies:** 4\ **Last updated:** [July 28, 2026, 8:59am UTC](https://help.ganttproject.biz/t/resource-availability-impact-on-task-duration/12397 "2026-07-28T08:59:01Z")
Hello, I’d like to know how to make GanttProject modify the duration (or end date) of a task depending on the (in)availability of a ressource allocated to the task. Thank you --- ## [Vertical line at milestone](https://help.ganttproject.biz/t/vertical-line-at-milestone/12395)
**Author:** [@jockel68](https://help.ganttproject.biz/u/jockel68)\ **Replies:** 1\ **Last updated:** [July 12, 2026, 9:16pm UTC](https://help.ganttproject.biz/t/vertical-line-at-milestone/12395 "2026-07-12T21:16:42Z")
how can i generate a vertical line at a milestone? --- ## [Text doesn't show in task columns](https://help.ganttproject.biz/t/text-doesnt-show-in-task-columns/6519)
**Author:** [@Eleanor](https://help.ganttproject.biz/u/Eleanor)\ **Replies:** 5\ **Last updated:** [July 11, 2026, 2:45am UTC](https://help.ganttproject.biz/t/text-doesnt-show-in-task-columns/6519 "2026-07-11T02:45:25Z")
Whenever I add a task and edit the details in task properties, no text appears under the task columns for task name, begin date, end date etc. The following error message has appeared: Something went wrong com/sun/java… --- ## [Beginn and end of a task determined by other tasks](https://help.ganttproject.biz/t/beginn-and-end-of-a-task-determined-by-other-tasks/12393)
**Author:** [@jockel68](https://help.ganttproject.biz/u/jockel68)\ **Replies:** 0\ **Last updated:** [July 9, 2026, 11:55am UTC](https://help.ganttproject.biz/t/beginn-and-end-of-a-task-determined-by-other-tasks/12393 "2026-07-09T11:55:16Z")
Hi, i want that the begin of task determined by the end of an other task and the end of the task must end with a milestone thanks --- ## [Custom role set name not showing up when making a new project](https://help.ganttproject.biz/t/custom-role-set-name-not-showing-up-when-making-a-new-project/7089)
**Author:** [@durian188](https://help.ganttproject.biz/u/durian188)\ **Replies:** 4\ **Last updated:** [June 19, 2026, 12:18am UTC](https://help.ganttproject.biz/t/custom-role-set-name-not-showing-up-when-making-a-new-project/7089 "2026-06-19T00:18:41Z")
Following the information in I have added a new set of Resource roles \ \ \ \ \ **Author:** [@Cleo](https://help.ganttproject.biz/u/Cleo)\ **Replies:** 4\ **Last updated:** [June 17, 2026, 9:03am UTC](https://help.ganttproject.biz/t/ganttproject-ne-souvre-pas-et-bloque-sur-un-fond-blanc/12388 "2026-06-17T09:03:02Z") Mon logiciel fonctionnait puis il a bloqué. J’ai mis fin à la tache avec le gestionnaire de tache. Impossible de d’ouvrir mon fichier : message " failed to launch jvm" J’ai réinstallé ganttproject et java voila l’aspe… --- ## [Is it possible to fix the task column widths irrespective of panel slider position?](https://help.ganttproject.biz/t/is-it-possible-to-fix-the-task-column-widths-irrespective-of-panel-slider-position/12293)
**Author:** [@andrew1](https://help.ganttproject.biz/u/andrew1)\ **Replies:** 2\ **Last updated:** [June 12, 2026, 3:24pm UTC](https://help.ganttproject.biz/t/is-it-possible-to-fix-the-task-column-widths-irrespective-of-panel-slider-position/12293 "2026-06-12T15:24:17Z")
I am fairly new to GanttProject, but so far it’s looking a nice solution for our needs. However, I am finding the column configuration a little frustrating and was wondering if anyone else was having the same issues. In… --- ## [I can't add new task](https://help.ganttproject.biz/t/i-cant-add-new-task/12366)
**Author:** [@g.tille](https://help.ganttproject.biz/u/g.tille)\ **Replies:** 2\ **Last updated:** [May 18, 2026, 4:41am UTC](https://help.ganttproject.biz/t/i-cant-add-new-task/12366 "2026-05-18T04:41:16Z")
I can’t add new tasks. When I right-click, the menu appears, but the “New Task” button is grayed out and I can’t click on it. If I go to the Tasks menu, I can click the “New Task” button, but nothing happens. --- ## [Sub-task schedule doesn't automatically pull in?](https://help.ganttproject.biz/t/sub-task-schedule-doesnt-automatically-pull-in/12364)
**Author:** [@eescott](https://help.ganttproject.biz/u/eescott)\ **Replies:** 1\ **Last updated:** [May 11, 2026, 5:45pm UTC](https://help.ganttproject.biz/t/sub-task-schedule-doesnt-automatically-pull-in/12364 "2026-05-11T17:45:24Z")
Hi, let’s suppose I have a project with a few linked tasks where one of the tasks is a parent task (not sure the right term here, sorry). If one of the predecessors of that parent task is pulled in, say duration changes … --- ## [\[3.2\] Display issue between 3.1 and 3.2](https://help.ganttproject.biz/t/3-2-display-issue-between-3-1-and-3-2/4410)
**Author:** [@Frantz](https://help.ganttproject.biz/u/Frantz)\ **Replies:** 13\ **Last updated:** [April 15, 2026, 10:10am UTC](https://help.ganttproject.biz/t/3-2-display-issue-between-3-1-and-3-2/4410 "2026-04-15T10:10:38Z")
Hi, I have a display issue since I upgraded to version 3.2. Here’s a screenshot of my project in version 3.1.3103: The same project in version 3.2.3220: You can see that the left part (tasks tree texts) is unrea… --- ## [Feature request: Zooming out to Quarter/Year timeline](https://help.ganttproject.biz/t/feature-request-zooming-out-to-quarter-year-timeline/1547)
**Author:** [@mh1252315](https://help.ganttproject.biz/u/mh1252315)\ **Replies:** 7\ **Last updated:** [April 6, 2026, 1:52pm UTC](https://help.ganttproject.biz/t/feature-request-zooming-out-to-quarter-year-timeline/1547 "2026-04-06T13:52:44Z")
Hello, unfortunately I created the gantt chart for my research proposal in ganttproject and have only now realized, that you cant zoom out to more then a monthly view. This makes it impossible to display a 5 year plan m… --- ## [Arbitrary Years?](https://help.ganttproject.biz/t/arbitrary-years/12352)
**Author:** [@AaronD](https://help.ganttproject.biz/u/AaronD)\ **Replies:** 5\ **Last updated:** [March 30, 2026, 8:28pm UTC](https://help.ganttproject.biz/t/arbitrary-years/12352 "2026-03-30T20:28:32Z")
As I browse the forum, I see lots of requests across lots of threads to be able to zoom out much farther than is presently possible. Please do that! Preferably without limit. But this thread is about the starting poin… --- ## [Erreur à l'ouverture de GP failed to launch the UI :](https://help.ganttproject.biz/t/erreur-a-louverture-de-gp-failed-to-launch-the-ui/12343)
**Author:** [@rosoli](https://help.ganttproject.biz/u/rosoli)\ **Replies:** 2\ **Last updated:** [March 10, 2026, 8:56pm UTC](https://help.ganttproject.biz/t/erreur-a-louverture-de-gp-failed-to-launch-the-ui/12343 "2026-03-10T20:56:16Z")
Bonjour, j’ai installé la version GP 3.3.3316 sur un windows 11 pro. Je suis admin de l’ensemble du répertoire GP. Pas de Java oracle installé localement. ou lancement de GP, j’ai l’erreur Failed to launch the UI : … --- ## [Cost management: planned vs actual (EV management)](https://help.ganttproject.biz/t/cost-management-planned-vs-actual-ev-management/4021)
**Author:** [@malcaraz](https://help.ganttproject.biz/u/malcaraz)\ **Replies:** 9\ **Last updated:** [March 6, 2026, 9:51am UTC](https://help.ganttproject.biz/t/cost-management-planned-vs-actual-ev-management/4021 "2026-03-06T09:51:07Z")
Does GP calculate actual cost, related to the progress of a task? To get the actual cost ¿is it as simple as TotalCost x %completeness? --- ## [How to show the time range (delay) allowed to an activity become critical on critical patch chart?](https://help.ganttproject.biz/t/how-to-show-the-time-range-delay-allowed-to-an-activity-become-critical-on-critical-patch-chart/3024)
**Author:** [@gabrielstockler](https://help.ganttproject.biz/u/gabrielstockler)\ **Replies:** 12\ **Last updated:** [March 4, 2026, 11:15am UTC](https://help.ganttproject.biz/t/how-to-show-the-time-range-delay-allowed-to-an-activity-become-critical-on-critical-patch-chart/3024 "2026-03-04T11:15:04Z")
How can I show the time range highlighted in red on a column or in the chart? Thanks!! Doubt|684x158 --- ## [Why aren't the dates displaying?](https://help.ganttproject.biz/t/why-arent-the-dates-displaying/12339)
**Author:** [@duffaut](https://help.ganttproject.biz/u/duffaut)\ **Replies:** 1\ **Last updated:** [February 22, 2026, 10:44pm UTC](https://help.ganttproject.biz/t/why-arent-the-dates-displaying/12339 "2026-02-22T22:44:46Z")
Bonjour, Why aren’t the dates displaying? Thanks for help --- ## [Unable to verify signature: Bad signature length when updating from 3.3.3316 to 3.3.3320](https://help.ganttproject.biz/t/unable-to-verify-signature-bad-signature-length-when-updating-from-3-3-3316-to-3-3-3320/12340)
**Author:** [@nicobat](https://help.ganttproject.biz/u/nicobat)\ **Replies:** 0\ **Last updated:** [February 22, 2026, 5:08am UTC](https://help.ganttproject.biz/t/unable-to-verify-signature-bad-signature-length-when-updating-from-3-3-3316-to-3-3-3320/12340 "2026-02-22T05:08:10Z")
Unofficial solve for this issue below, run at your own peril (very dramatic music plays :slight\_smile: ) I couldn’t find an example of this issue in the posts and I think it was originally caused by installing 3.3.3316 … --- ## [Issue with the GanttProject scale](https://help.ganttproject.biz/t/issue-with-the-ganttproject-scale/12337)
**Author:** [@DmitryBarashev](https://help.ganttproject.biz/u/DmitryBarashev)\ **Replies:** 1\ **Last updated:** [February 20, 2026, 11:00am UTC](https://help.ganttproject.biz/t/issue-with-the-ganttproject-scale/12337 "2026-02-20T11:00:35Z")
This came by email I have a problem with GanttProject scale. The scale is so small that I can’t find the settup putton where I could change the scale to larger. Is there any keyboard commands how I could change the scal… --- ## [Tagging or Grouping](https://help.ganttproject.biz/t/tagging-or-grouping/12336)
**Author:** [@Ben\_Rottersman](https://help.ganttproject.biz/u/Ben_Rottersman)\ **Replies:** 3\ **Last updated:** [February 19, 2026, 9:58pm UTC](https://help.ganttproject.biz/t/tagging-or-grouping/12336 "2026-02-19T21:58:29Z")
I am looking for a way to ID tasks beyond color or assignment. Is there a way to have a development team tag so I can sort by all development team tasks beyond indenting or coloring them? Thinking about a task that is cr… --- ## [Ganttproject slow and unresponsive](https://help.ganttproject.biz/t/ganttproject-slow-and-unresponsive/12333)
**Author:** [@user1](https://help.ganttproject.biz/u/user1)\ **Replies:** 3\ **Last updated:** [February 11, 2026, 7:35pm UTC](https://help.ganttproject.biz/t/ganttproject-slow-and-unresponsive/12333 "2026-02-11T19:35:32Z")
Hi, Just stared using ganttproject desktop (windows 11, i5, 8GM ram) these days and I’m experiencing some issues. It becomes sluggish when creating a new task. When I delete a task, another one gets deleted as well. In… --- ## [Linked task does not 'move' to predecessor end](https://help.ganttproject.biz/t/linked-task-does-not-move-to-predecessor-end/12327)
**Author:** [@freiheitsgrad](https://help.ganttproject.biz/u/freiheitsgrad)\ **Replies:** 7\ **Last updated:** [February 11, 2026, 9:19am UTC](https://help.ganttproject.biz/t/linked-task-does-not-move-to-predecessor-end/12327 "2026-02-11T09:19:01Z")
Hi, I’m using 3.3.3316. I’ve noticed that when creating a new task (task2) and linking it to the predesessor (task1) via end/begin (hard link), task2’s start date does not change but stays at its creation date (project s… [Next page](https://help.ganttproject.biz/c/ganttproject-desktop-support/7.md?page=1)