If you see the V020 warning in the report, it means that an error has occurred while working with the diagnostic rule configuration files (.pvsconfig). The specific cause of the error is displayed with the diagnostic rule message.
In case you cannot solve the issue, we are glad to help you. Please contact us via the feedback form and list the directives (or their combination) that caused the error. To make it easier for us to spot the issue, please also attach the configuration file that issued the warning.