I uninstalled the maven plugin but when trying to run the project that was perfectly running before the plugin I have "Referenced classpath provider does not exist: org.maven.ide.eclipse.launchconfig.classpathprovider". I assume I have to change the launch configuration for the project. Can anyone provide the steps to do so? Thank you.
This helped me http://sha.nnoncarey.com/blog/archives/33
If you get this error when launching a Run Configuration in Eclipse with the IAM (Maven) >plugin:
Referenced classpath provider does not exist: >org.maven.ide.eclipse.launchconfig.classpathProvider
It’s probably because your Run Configuration was created on an old project, and has bad >entries in the Classpath section. The solution is to delete the Run Configuration and create >a new one.
The project could be having old/incorrect settings. Assuming it is a maven project, one possibility is you could regenerate the Eclipse settings for the project by
mvn eclipse:clean eclipse:eclipse
This link helped me: http://osdir.com/ml/web.webobjects.woproject.devel/2005-09/msg00090.html
I commented out string with CLASSPATH_PROVIDER.
来源：https://stackoverflow.com/questions/4094439/how-to-change-a-referenced-classprovider-in-eclipse