Gephi forums

Posted: **27 Apr 2013 15:53**

Dear all,

I'm a new user of Gephi. I was able to get it installed without a problem on my work PC, but am struggling to install it on my personal Mac. I've downloaded the application, and when I click on it in the disk image, it works exactly as expected. The interface loads, I'm able to open my files, etc.

However, when I drag it to my application folder (or anywhere else on my computer), the application won't load. The window opens, it reads "Opening Main Window..." for a few moments. Here's a screenshot of what I get. Nothing shows up under File, Workspace, View, Tools, or Window, although I do have options under Plugins. The little red minus sign in the bottom right corner reads "Unexpected Exception: java.lang.NullPointerException." It also appears initially when I open Gephi off the disk image, then goes away shortly.

I've tried making sure that I have Java 6 (I do and it seems to be activated, confirmed with Terminal). I've tried restarting. I've tried deleting it and my directory, re-downloading and reinstalling. Any suggestions on how to proceed would be greatly appreciated.

Posted: **26 Jul 2013 23:07**

Same problem here.

First it wouldn't launch at all, then I installed Java.
It still wouldn't launch, I tried to run 'Java VisualVM' just for the heck of it. Then it prompted me to install the JRE, which I did.
Now Gephi launches, but sits at the main window (unloaded, gray background) and menu items on my Mac are unloaded.

Posted: **09 Aug 2013 17:09**

+1

I had the same exact situation on mac (OS X Mountain Lion, 64bit)
I should add that at first trial few days ago (after having performed the Java install) it worked.
Then i deleted it and re-installed it today, but nothing. same grey workspace and empty menus.
Here's the error it gave:

Code: Select all

java.lang.NullPointerException
	at org.netbeans.modules.autoupdate.ui.actions.AutoupdateSettings.getSuperIdentity(AutoupdateSettings.java:435)
	at org.netbeans.modules.autoupdate.ui.actions.AutoupdateSettings.generateIdentity(AutoupdateSettings.java:136)
	at org.netbeans.modules.autoupdate.ui.actions.AutoupdateCheckScheduler.signOn(AutoupdateCheckScheduler.java:110)
	at org.netbeans.modules.autoupdate.ui.actions.Installer.restored(Installer.java:63)
	at org.netbeans.core.startup.NbInstaller.loadCode(NbInstaller.java:469)
[catch] at org.netbeans.core.startup.NbInstaller.loadImpl(NbInstaller.java:392)
	at org.netbeans.core.startup.NbInstaller.access$000(NbInstaller.java:103)
	at org.netbeans.core.startup.NbInstaller$1.run(NbInstaller.java:344)
	at org.openide.filesystems.FileUtil$2.run(FileUtil.java:619)
	at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
	at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:607)
	at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:603)
	at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:623)
	at org.netbeans.core.startup.NbInstaller.load(NbInstaller.java:341)
	at org.netbeans.ModuleManager.enable(ModuleManager.java:1179)
	at org.netbeans.ModuleManager.enable(ModuleManager.java:1002)
	at org.netbeans.core.startup.ModuleList.installNew(ModuleList.java:340)
	at org.netbeans.core.startup.ModuleList.trigger(ModuleList.java:276)
	at org.netbeans.core.startup.ModuleSystem.restore(ModuleSystem.java:296)
	at org.netbeans.core.startup.Main.getModuleSystem(Main.java:169)
	at org.netbeans.core.startup.Main.start(Main.java:305)
	at org.netbeans.core.startup.TopThreadGroup.run(TopThreadGroup.java:123)
	at java.lang.Thread.run(Thread.java:680)

BUT
after i deleted the old gephi folder in
/Users/YourUserName/Library/Application Support (beware of the space character)
everything went back to normal!
Hope this helps.

Posted: **21 Aug 2013 11:54**

I only wanted to say THANK YOU to Cartowsky. This bug was driving me crazy.

Posted: **13 Sep 2013 13:09**

I had the same problem on Ubuntu, which drove me crazy.

A solution is to delete this hidden folder /home/NAME/.gephi/

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