In most cases, the error Incorrect function indicates that the command being used has some kind of syntax issue, or that the file you are referencing cannot be found or accessed. It might be the package share cannot be accessed or, if another share as the default is used, you can check and re-enter the path in the Deployment\Security Options.
If it is not the access, then I'm not sure what would cause it. Might be best to ask support then.