eclipse “problems during content assist” popup

Question

While typing some Java code, I hit the dot/member operator (.) as in the dot inside ObjectName.methodName and got this error in a popup in Eclipse:

The `org.elcipse.jst.ws.jaxws.ui.jaxwsjavacompletioncomputer` 
proposal computer from the `org.eclipse.jst.ws.jaxws.ui` 
plug-in did not complete normally.

A second popup immediately followed with the message:

"Cannot perform operation: The compilation unit 
is not in the build path of a Java project".

Does this mean some required library is not installed as it needs to be?

Answer 1

From some of the occurrences out there, it looks like your current project has no "Java nature" attached to it.

Check the project properties. See if its .project file has a javanature in it.

Answer 2

Sounds like your Eclipse installation is a bit confused. In my experience the best approach here is to discard your current installation, and unpack a new.

Answer 3

Check whether your .project contains javanature as follows :

<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>

If it is missing, add it...

It's very late, but I hope someone will find it useful.