This page describes non-standard options that can be useful when using crtools
Evasive devices
Sometimes an application opens a device file and then somehow the path by which it was opened becomes inaccessible (e.g. overmounted or unlinked). In that case crtools cannot easily dump and restore such a process. If you consider that the path doesn't really matter when dumping your apps state you can tell crtools that a device file can be opened by any name, even if the original one is no longer accessible. The option for that is --evasive-devices