Unable to delete unused variables in Captivate 7

Hi

I am using CP 7.0.1.237 on a Windows 7 64 bit system.

While testing few things on a project, I had created some dummy variables and used them in advanced actions. Now, I have deleted those advanced actions and I haven't used them anywhere else. But when I try to delete the associated variables, I am still asked to delete all references to the variable. Is this a bug? Is there a way / workaround to delete them?

Thanks

Sreekanth