H5P_FREE_MERGE_COMMITTED_DTYPE_PATHS clears the suggested paths stored in the object copy property list ocpypl_id. These are the suggested paths previously set with H5P_ADD_MERGE_COMMITTED_DTYPE_PATH.

Returns a non-negative value if successful; otherwise returns a negative value.

H5P_FREE_MERGE_COMMITTED_DTYPE_PATHS will fail if the object copy property list is invalid.

int main(void) {
    hid_t ocpypl_id = H5Pcreate(H5P_OBJECT_COPY);

    /* Enable the merging committed datatype feature. */
    H5Pset_copy_object(ocpypl_id, H5O_COPY_MERGE_COMMITTED_DTYPE_FLAG);

    /* Add a path to search for a matching committed datatype. */
    H5Padd_merge_committed_dtype_path(ocpypl_id, "/group/committed_dtypeA");

    /* Do the copy. */
    H5Ocopy(...ocpypl_id...);
    ...
    ...
    /* Free the previous suggested path. */
    H5Pfree_merge_committed_dtype_paths(ocpypl_id);

    /* Add a path to search for a matching committed datatype. */
    H5Padd_merge_committed_dtype_path(ocpypl_id, "/group2/committed_dtypeB");

    /* Do the copy. */
    H5Ocopy(...ocpypl_id...);
    ...
    ...
}