encountered unexpected internal error: NoSuchMethodError

[GoogleCodeExporter]

Under Windows 8.1,
1. Installed GWT SDK 2.6.1 and Eclipse 4.3 plugin: 
http://www.gwtproject.org/usingeclipse.html?csw=1
2. Created a sample web application, per instructions in the above URL.
3. Tried to open the main java class with GWT Designer.

Internal Error
encountered unexpected internal error. 

This could be caused by a bug or by a misconfiguration issue, conflict, partial 
update, etc.

java.lang.NoSuchMethodError: 
com.google.gwt.dev.cfg.ModuleDefLoader.loadFromClassPath(Lcom/google/gwt/core/ex
t/TreeLogger;Ljava/lang/String;Z)Lcom/google/gwt/dev/cfg/ModuleDef;


Stacktrace & report are attached.

Original issue reported on code.google.com by [email protected] on 24 Sep 2014 at 5:45

Attachments:

• report-20140924-013019.zip

[GoogleCodeExporter]

This was also reported at 
https://groups.google.com/forum/#!topic/google-plugin-eclipse/Vy1wgknpdtU
I found a solution: After following the GWT instructions for installing Eclipse 
4.3  plugins for SDK 2.6.1 (http://www.gwtproject.org/download.html), I had to 
manually fix the wrong version in Eclipse=>Windows=>Preferences=>Google=>Web 
Toolkit, by entering the separate install folder of gwt-2.6.1. It appears the 
plugin installed from Eclipse contained gwt 2.6.0 (not up to date).
For me, this resolved the GWT Designer problem.

Original comment by [email protected] on 26 Sep 2014 at 3:43