Kura: Export Plug-in throws Nullpointer Exception - nullpointerexception

I am working on the Kura/osgi "Hello World Example" from the Kura website to develop my first osgi bundle.
When I want to export the project as described (export - Deployable plug-ins and fragments) , I get the following:
An internal error occurred during: "Export Plug-ins".
java.lang.NullPointerException
Unfortunately there is no more information.
This seems to be the same as described and "solved"(?) here
But I do not really get what to do to solve the problem.
I am using:
Win 7 (64),
Eclipse Luna,
Equinox 3.8.1 (as used in Kura downloads)
Thanks for support!

Solved: Although the Eclipse Plug-Ins Developer Environment (PDE) in Eclipse Luna seemed to be installed already, it did not work properly. Reinstalling PDE worked fine for me

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I saw this question, which suggests it is possible to use PyCharm as the target for a "Plugin" run configuration, but I haven't had any luck following those steps. I set the JRE to /opt/pycharm-professional/jre64 but got Exception in thread "main" java.lang.ClassNotFoundException: com.intellij.idea.Main. I then grabbed the java command line args from a running instance of PyCharm and added those in (particularly the classpath) but got Error: Could not find or load main class com.intellij.rt.execution.application.AppMainV2. I haven't been able to find anything in the docs on how to set this up.

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I'm using IntelliJ IDEA to build a non-java project, it is just a PHP + Javascript project, everything is working just fine but when I try to Inspect all the code in the project (Analyze -> Inspect Code) I get an error:
The JDK is not configured properly for this project. Inspection cannot proceed.
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In my case, I didn't wanted to delete the module since I have a bunch of stuff configured (data sources, dictionaries, http requests) and a lot of code in the shelf (which I believe it's stored along the project/module). I found that you can skip the "delete your module" part and instead just update the module config:
Find the $module.iml file (in my case it's inside the .idea directory) and at the top there's was a line:
<module type="JAVA_MODULE" version="4">
which I changed to:
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The issue was fixed and I haven't seen any side-effects but, just in case, you might want to backup the .idea directory.
I raised this over at https://youtrack.jetbrains.com/issue/IDEA-188017 - after some back and forth, the Jetbrains employee helped me figure out that I had a Java module in there.
If you are not using Java, please crate a module of a Static Web type. Now you have a module of a Java type, that is why the error is reported, so such behaviour is expected.
Delete your Java module.
Once you enter in the menu in the screenshot below, find the Static Web type and create your module like that.
Seems like adding a SDK the code analyzer works just fine, even though the project has no single java module.
Maybe it is a bug, so I will report it.
My project's .idea/<project>.iml file had an entry:
<orderEntry type="inheritedJdk" />
I quit Idea, removed the line above from the iml file, restarted Idea and the next Inspection ran without any issues.
I recently ran into this issue with my purely Python project.
After much frustation, I bumped into a rather bizarre solution:
When IntelliJ complained that JDK is not configured, in the following dialog box, I just selected JDK8 (instead of Python 3.7.2 path) and viola! its gone.
My environment was
IntelliJ IDEA 2018.3.4 (Community Edition)
Build #IC-183.5429.30, built on January 29, 2019
JRE: 1.8.0_152-release-1343-b26 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
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IntelliJ 12 Grails 2.1 Configuration - Grails SDK not configured

I feel like I'm missing something simple at this point. I upgraded to grails 2.1.1 from 1.3.7 while running IntelliJ 10, recently I upgraded to IntelliJ 12 and imported all settings. Somehow in the project in IntelliJ 12, I have no grails SDK.
My Global Library has grails 2.1.1 defined with all the correct .jars included, however, the Tools menu is missing the "Grails" sub-menu, and attempting to run the app gives the error message that Grails SDK is not configured.
If I create a new project for grails, the SDK configures correctly and Grails shows in the Tools menu. What am I missing preventing me from adding the Grails SDK to this project? Thank you, community, for your time and suggestions.
You do not have to create a new project.
Had the same problem, and it took me quite some search to resolve it:
right click your Grails module
click "Add framework support"
select "Groovy"
The dropdown next to "Use library" will allow you to choose a grails library.
If the dropdown is empty press "create" and choose your grails library directory.
Grails SDK is configured then
With Intellij 16 right click on your project in the right hand project pane.
Choose Grails->Configure Grails SDK.
If you're using the grails wrapper I would point to that SDK:
/Users/your user/.grails/wrapper/2.5.2/grails-2.5.2
I have the IntelliJ 12 too, to run app i just click in 'File' -> 'Create Project', select 'Grails Project'
Click Next,
Click em Create, select the folder, who contain the Grails 2, and Voila. :-)
If you has the project before, run in project 'grails integrate-with --intellij' or run import project, and create a Grails SDK
I found a symlink that points to the latest version in:
~/.sdkman/candidates/grails/current
I'm using SDKMAN 4.0.37
Pointing Intellij at that location will allow you to switch versions using sdkman.
Not really an "answer" here, but after seeing similar troubles with IDEA I went ahead and just created a new project and copied my source in and resolved my issues, if not solving the actual problem.
I am working with IntelliJ 12.0.1 ultimate.
I have installed Grails 2.3.1 on my computer, but always got errors when trying to specify it as a Grails SDK-
"failed to create library. Looks like Grails distribution in specified path is broken. Cannot determine version."
I tried with Grails 2.3.0, but got the same error.
Then, I tried my luck with Grails 2.2.4, and I could finally get it work.
Creating a New Project will actually not overwrite any existing code; just point it at your existing project directory, select Grails and open it up.
Your project will now complain that there is no Grails SDK; just point it at your Grails dist and you are good to go.
Recently, I've encountered a similar type of issue. I have the grails SDK folder, but OK Button not enabled when trying to configure from the project. Then we have installed the Grails Plugin in IntelliJ. Then OK Button enabled and grails SDK is configured into project.

eclipse scala plugin, scala project type missing

After installing the scala eclipse plugin on helios the scala project type is missing, there is no scala options in the preferences and no other indication that installation has worked. Then when I check 'what is already installed' in the install new software window I can see that the plugin is there....
I can replicate the same problem across several machines in the office however I'm able to install on my own machine at home without a problem....
anyone got any ideas/tips on how to troubleshoot this ??
thanks in advance
Looks like not everything was installed properly.
Before figuring out what is going on, try answering these questions:
In preferences, look for JDT Weaving. Is it enabled?
Any errors in your error log?
What version Eclipse are you running?
For your office machines is Eclipse installed in a read-only directory or C:\Program Files?

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I am getting the following error when I try to use the Eclipse IDE wizard to create a Servlet:
"java.lang.Eror: Unresolved compilation problems:
The import org.eclipse.jst.j2ee.internal.common cannot be resolved.
CreateServletTemplateModel cannot be resolved to a type
....
"
The settings of the IDE are as follows:
Eclipse Version: 3.4.2
WTP Servlet UI Plug-in: 1.1.203.v20081022000
(org.eclipse.jst.servlet.ui)
I don't have any problems manually creating the Servlets, I just would like the IDE to work as it's supposed to in order to avoid the overhead.
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As mentioned here, that could be linked to a WTP installation issue.
Try to see if you still have the problem with:
WTP3.0.5 (compatible with your eclipse3.4.2)
or
with the J2EE package (all-in-one distribution, see here for ganymede - 3.4.2 - packages)
Note: in both cases, you can duplicate your eclipse 3.4 installation, points to a fresh workspace and do your tests here (in order to avoid modifying anything from your current setup).