• file is the name of the c-tree file. The default file extension (that is ".dat" if not configured differently) must be omitted. Relative paths are resolved according to the c-tree server working directory.

• If the -x option is specified, ctutil performs extended tests matching records with keys.

• If the -k=index option is specified, the check is performed only on the index specified. For very large files with many indexes, you may want to consider using this option to validate only a single index.