Applies to Brocade switch FOS Upgrade SANnav Issue Below error seen while upgrading via SANNAv application- "Non disruptive firmware download is not supported when firmware download with two versions ...Applies to Brocade switch FOS Upgrade SANnav Issue Below error seen while upgrading via SANNAv application- "Non disruptive firmware download is not supported when firmware download with two versions apart. Please try again from cli with single mode option enabled."