Invalid character string

Synopsis
There were unexpected characters on an argument you supplied.

Cause
When passing some argument to an add-on library, Exit handler, or Environment, you supplied some text that is not considered legitimate by the software.

Cure
Consult the documentation for that product to see what arguments you should be passing to a particular function/command that you're trying to use in that add-on library, Exit handler, or Environment. Look up this error message in that documentation. Check that you have the latest version of the software.