If Access Manager 7.1 patch 3 is deployed from a single WAR file on Windows, running the updateschma.pl script fails because the path to the tools directory is hard-coded.
Workaround. Remove /amAdminTools from the following line of the updateschema.pl file and then rerun the script:
$AM_ADMIN_CMD="$WAR_TOOLS_DIR/amAdminTools/$DEPLOY_URI/bin/amadmin.bat";