“InvocationTargetException” is getting logged in server log when removing a solution pack whose controls are already installed

Error generated in log file while trying to remove a solution pack.

Mon Sep 12 16:53:50 EDT
2011|INFO|Thread-8384|esecurity.ccs.comp.audit.AuditLogger.execute
    Audit High:: Action by user admin via Sentinel service Server object
PluginRepositoryService method RemoveSolutionPack client Unknown failed :
Remove solution pack BillsSolutionPackWithANamespace (ID
F42D1C00-BFAB-102E-9E37-00FF056216B8) of type SOLUTION_PACK., with XDAS
taxonomy name: XDAS_AE_DELETE_DATA_ITEM
Mon Sep 12 16:53:50 EDT
2011|SEVERE|Thread-8384|esecurity.base.ccs.comp.BaseRemoteObjectTask.execute
    Error obtaining AccessChecker for method _removeContentPackage_ of object
PluginRepositoryService; Exception java.lang.reflect.InvocationTargetException;
; Caused by Can not remove a solution pack that has deployed control(s) in it.;
java.lang.Exception; 
Mon Sep 12 16:53:50 EDT
2011|SEVERE|Thread-8384|esecurity.base.ccs.comp.BaseRemoteObjectTask.execute
    java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at
esecurity.base.ccs.comp.BaseRemoteObjectTask.execute(BaseRemoteObjectTask.java:111)
        at
esecurity.base.ccs.comp.GenericRemoteObjectTask.processRequest(GenericRemoteObjectTask.java:88)
        at esecurity.base.ccs.comp.GenericTask.process(GenericTask.java:91)
        at esecurity.base.ccs.comp.GenericTask.process(GenericTask.java:65)
        at esecurity.base.ccs.comp.BaseTask.run(BaseTask.java:52)
        at
esecurity.base.ccs.comp.threadpool.TaskThreadPool$RunWrapper.run(TaskThreadPool.java:89)
        at
EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:732)
        at java.lang.Thread.run(Unknown Source)
    Caused by:
esecurity.ccs.comp.repository.RemoveDeployedContentPackException: 
        at
esecurity.ccs.comp.repository.EPluginRepositoryService.removeContentPackage(EPluginRepositoryService.java:892)
        at
esecurity.db.object.PluginRepositoryServiceAuditShim.removeContentPackage(PluginRepositoryServiceAuditShim.java:353)
        at
esecurity.db.object.PluginRepositoryServiceServerStub._removeContentPackage_(PluginRepositoryServiceServerStub.java:111)
        ... 12 more
    Caused by: java.lang.Exception: Can not remove a solution pack that has
deployed control(s) in it.
        at
esecurity.ccs.comp.repository.RemoveDeployedContentPackException.<init>(RemoveDeployedContentPackException.java:20)
        ... 15 more

This is a minor issue, the only problem is the exception in the log.
This can happen if controls are already installed and deployed.
Remove the controls and remove any remaining components of the solution pack.