I am using STS 2.6.1 to build a grails application. After I updated the application to grails 1.3.7 (from the command line) an updated the spring security core & spring security acl plugins, the IDE started complaining that it cannot find classes such as
grails.plugins.springsecurity.Secured
grails.plugins.springsecurity.acl.AbstractAclObjec tIdentity
etc.

I made sure that the IDE is pointing to Grails 1.3.7.

I tried restarting the IDE, but that didn't help.
I tried cleaning the project, but that didn't help.
I tried deleting the project and re-adding it to the workspace, but that didn't help.

Despite the alleged compilation errors, the application builds and runs fine. It also runs without complaining from the shell command line.

I am wondering if there is some compiled cache somewhere that's not being cleared.

What should I try next to get the errors to go away?

Thanks,

Gene