OD version 6.

For Prompt and Collect node, termination character is set as # in item properties. But still when i enter *, it is taken as a termination character.
Example: Customer is asked to enter 6 digit pin followed by #. Prompt is played when customer enters invalid input.

Customer enters 1234*, it is taken as invalid input and invalid prompt is played. * is being taken as a termination character.

Can you show me which grammar you use and how you configure the terminating character?