1. WbProcessingException: Two consecutive edges, 2 and 0, have...

I get this error occasionally using Weaverbird. Where do I find Weaverbird's "Clean Up Mesh"?

1. WbProcessingException: Two consecutive edges, 2 and 0, have the same value,0, in face 4720. This topology is invalid. Try using Weaverbird's Clean Up Mesh first. - Weaverbird was unable to produce a valid result because of this