MyEclipse Unable to generate class file

Re-install the system after the new MyEclipse, just start to run the Web project without any problems, and then the situation can not be started, because the class is not found, this time into the Tomcat project in the Web-inf/class folder found not to generate the corresponding class file, Take the following measures:

1. Clean, re-deploy, fail

2. Clean the specified project, redeploy, and rebuild or fail

3, delete the project and re-import, successful

MyEclipse Unable to generate class file