Can't launch GanttProject

nmatz · January 28, 2020, 6:48pm

I would like to evaluate GanttProject for use in program management for Mac users. I downloaded the product, but I can’t launch it. When I try to launch, the icon bounces on the toolbar and then disappears. I already downloaded Java Runtime Environment as required.

Any ideas why this is happening?

DmitryBarashev · January 28, 2020, 7:25pm

github.com/bardsoftware/ganttproject

Issues with launching GanttProject on macOS

opened 06:19PM - 30 Jan 19 UTC

dbarashev

OpSys-OSX KnowledgeBase

## Symptoms and Summary You have macOS and you can't launch GanttProject appl…ication. It either says "Unable to load Java Runtime environment" or just nothing happens after double-clicking the application. These issues are reportedly specific to macOS Mojave with Java 10, however, there are chances of seeing them on other combinations of macOS versions and Java Runtimes. Unfortunately, currently Java ecosystem passes a kind of turbulence, and vendors of Java Runtimes, operating systems and launcher applications cannot always agree with each other about the location of Java on the file system, and this is especially true on macOS. Below you can find two approaches to fixing this issue. ## Distribution with bundled Java Runtime The first approach is using GanttProject distro with bundled Java Runtime. We will officially start buildign such distros for all platforms with the next major GanttProject release, but meanwhile, we prefer to distribute GanttProject with no bundled Java. However, there is a special experimental [GanttProject distro with bundled Java 11 Runtime for macOS](https://www.dropbox.com/s/lj2uipbs4l6ygfc/ganttproject-2.8.10-r2364-jre.dmg?dl=0) which is available from our Dropbox folder. This distro is somewhat experimental, however, it is reported to be working. It is supposed to run fine without any additional downloads. ## Pointing GanttProject to your existing Java Runtime The second approach is to make GanttProject aware of your installed Java Runtime. ### Essential diagnostics Make sure that you really have Java Runtime. Open `Terminal` application and type `java -version` command. If Java Runtime is installed, you should see something like ``` java 10.0.2 2018-07-17 Java(TM) SE Runtime Environment 18.3 (build 10.0.2+13) Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.2+13, mixed mode) ``` ### Solution 1. If Java Runtime is not installed, please install it. For GanttProject 2.8+ [Java Runtime version 8](https://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html) is recommended, although more recent versions most likely will be okay. 1. If Java Runtime is installed, and you can run `java` in Terminal, you have a few options. First is to just try running GanttProject again. [According to tests from our users](https://help.ganttproject.biz/t/running-ganttproject-on-macos-mojave-with-java-10/587/19?u=dmitrybarashev) it may help. If it does not then please try using [fallback distro for Mojave](https://www.ganttproject.biz/dl/2.8.10/mac-mojave) which basically runs a shell script which executes `java` command with appropriate arguments.

nmatz · January 28, 2020, 7:49pm

It doesn’t say anything. It just looks like it tries to launch but then it gives up.

DmitryBarashev · January 28, 2020, 7:51pm

So did you try using workarounds described in the linked article?

nmatz · January 28, 2020, 7:52pm

No sorry. I missed it. What’s the workaround?

DmitryBarashev · January 28, 2020, 7:53pm

There is a link to the knowledge base article above. Please read it.

nmatz · January 28, 2020, 8:04pm

I downloaded Java Runtime Environment previously. I have to admit I don’t know what running it in “Terminal” means so not sure how to check that it’s really there.

Trying the fallback distro for Mojave got me to a point where it said the app was downloaded from the Internet and asked if I wanted to open. When I said yes, it again did not launch (no other messages).

nmatz · January 28, 2020, 8:05pm

OK, I got the terminal going.
java version “1.6.0_65”

Java™ SE Runtime Environment (build 1.6.0_65-b14-468)

Java HotSpot™ 64-Bit Server VM (build 20.65-b04-468, mixed mode)

DmitryBarashev · January 28, 2020, 8:06pm

Java 6 is very outdated and GanttProject won’t run on it. I really recommend you to try using a distro with bundled Java Runtime

nmatz · January 28, 2020, 8:08pm

I see you have a beat version in your Dropbox. I can try that.

nmatz · January 28, 2020, 8:27pm

I managed to download the distro with bundled Java Runtime, and it nows launches. I’ll give it a try.

Thanks so much for your help.