Creating a Password Composition Policy we need to know what is the maximum value for Maximum Length of the password.
What is the maximum password length in CA PAM Password Management?
Release: PAMDKT99500-2.7-Privileged Access Manager-NSX API PROXY
As of now, the maximum value for Maximum Length for a Password (in PCP) is 0xFF i.e. 255
When you create the PCP there is a Test button, which tells you when any of the parameters are invalid.