Question

I have installed the Vaadin plugin for Eclipse.

I created a test sample project, now I get the following error:

‘E:/Programming/Java/Eclipse/configuration/com.vaadin.integration.eclipse/download/gwt-dev/2.3.0/gwt-dev.jar’ in project ‘test’ cannot be read or is not a valid ZIP file

I even went to the above path and copied the file ‘gwt-dev.jar’ from there into the libraries folder for this web app, however now I am getting this error:

Archive for required library: ‘WebContent/WEB-INF/lib/gwt-dev.jar’ in project ‘test’ cannot be read or is not a valid ZIP file

How do I resolve this error? FYI, I am following the instructions given in the book “Learning Vaadin” by Nicolas Frankel to create a test project.

Answer 1

The error seems to suggest that either you don’t have the rights to read the file (which I doubt, since you were able to copy it), or the file is damaged. Check that the md5-signature matches with the one given here. If it doesn’t match, the file has been corrupted, and you need to download it again.

http://www.jarvana.com/jarvana/browse/com/google/gwt/gwt-dev/2.3.0/