Error DDPIPW0002 INVALID PASSWORD indicates the DD entity has a password associated with it.
The default password for CA created datadictionary entities is DD.
For your own entities you need to run DDUPDATE with -RPT INDEX to get the password.
For example for a file structure the report is:
Then look in the PSWD column. You will need to run this report for every entity giving you a password error.
Once you have the password add this to the BTG card like this:
where pswd is the password of the entity from the report.