# V064\. Unable to run a rule to analyze a code fragment\.

This error indicates that the analyzer failed to analyze a code fragment using the specified diagnostic rule\.

This issue may be due to an incomplete model built by the analyzer\. In this case, delete the `.PVS-Studio/models` directory \(located in the project directory\), then restart the analysis\. If the problem persists please contact our [support team](https://pvs-studio.com/en/about-feedback/) and attach text files from the `.PVS-Studio` directory so that we can fix this error as soon as possible\.

To get more information about the issue, enable the `verbose` mode as described in the documentation for the [V061](https://pvs-studio.com/en/docs/warnings/v061/) diagnostic rule\.