When updating subnetworks with the All subnetworks in tier and Continue on failure options set to true, a warning is returned if one or more subnetworks fail to update.
Subnetworks that are successfully updated are marked as clean in the Subnetworks table.
Review the ArcGIS Server logs for information about which subnetworks failed to update and the cause of failure. Another option is to review the subnetworks that are still marked as dirty in the Subnetworks table and attempt to update each subnetwork individually using the Update Subnetwork tool. See Update a subnetwork for more information.