RRDTool Command
rrdtool graph /tmp/IuBznGqXWAhK0Ssg  --alt-autoscale-max --rigid -E --start 1593476400 --end 1593562800 --width 1089 --height 300 -c BACK#EEEEEE00 -c SHADEA#EEEEEE00 -c SHADEB#EEEEEE00 -c CANVAS#FFFFFF00 -c GRID#a5a5a5 -c MGRID#FF9999 -c FRAME#5e5e5e -c ARROW#5e5e5e -R normal -c FONT#000000 --font LEGEND:8:DejaVuSansMono --font AXIS:7:DejaVuSansMono --font-render-mode normal -l 0 -E --start 1593476400 --end 1593562800 --width 1089 --height 300 -c BACK#EEEEEE00 -c SHADEA#EEEEEE00 -c SHADEB#EEEEEE00 -c CANVAS#FFFFFF00 -c GRID#a5a5a5 -c MGRID#FF9999 -c FRAME#5e5e5e -c ARROW#5e5e5e -R normal -c FONT#000000 --font LEGEND:8:DejaVuSansMono --font AXIS:7:DejaVuSansMono --font-render-mode normal COMMENT:'Que...                             Now         Min         Max        Avg\l' COMMENT:'\l' DEF:query_a4=192.168.1.4/app-pi-hole-21.rrd:query_a:AVERAGE  DEF:query_a4min=192.168.1.4/app-pi-hole-21.rrd:query_a:MIN  DEF:query_a4max=192.168.1.4/app-pi-hole-21.rrd:query_a:MAX  LINE2:query_a4#000000:'A Type                    ' AREA:query_a4#00000033:'' GPRINT:query_a4:LAST:%6.2lf%s GPRINT:query_a4min:MIN:%6.2lf%s GPRINT:query_a4max:MAX:%6.2lf%s GPRINT:query_a4:AVERAGE:'%6.'.2.'lf%s\n' COMMENT:'\n' DEF:query_aaaa4=192.168.1.4/app-pi-hole-21.rrd:query_aaaa:AVERAGE  DEF:query_aaaa4min=192.168.1.4/app-pi-hole-21.rrd:query_aaaa:MIN  DEF:query_aaaa4max=192.168.1.4/app-pi-hole-21.rrd:query_aaaa:MAX  LINE2:query_aaaa4#657C5E:'AAAA Type                 ' AREA:query_aaaa4#657C5E33:'' GPRINT:query_aaaa4:LAST:%6.2lf%s GPRINT:query_aaaa4min:MIN:%6.2lf%s GPRINT:query_aaaa4max:MAX:%6.2lf%s GPRINT:query_aaaa4:AVERAGE:'%6.'.2.'lf%s\n' COMMENT:'\n' DEF:query_ptr4=192.168.1.4/app-pi-hole-21.rrd:query_ptr:AVERAGE  DEF:query_ptr4min=192.168.1.4/app-pi-hole-21.rrd:query_ptr:MIN  DEF:query_ptr4max=192.168.1.4/app-pi-hole-21.rrd:query_ptr:MAX  LINE2:query_ptr4#F44842:'PTR Type                  ' AREA:query_ptr4#F4484233:'' GPRINT:query_ptr4:LAST:%6.2lf%s GPRINT:query_ptr4min:MIN:%6.2lf%s GPRINT:query_ptr4max:MAX:%6.2lf%s GPRINT:query_ptr4:AVERAGE:'%6.'.2.'lf%s\n' COMMENT:'\n' DEF:query_srv4=192.168.1.4/app-pi-hole-21.rrd:query_srv:AVERAGE  DEF:query_srv4min=192.168.1.4/app-pi-hole-21.rrd:query_srv:MIN  DEF:query_srv4max=192.168.1.4/app-pi-hole-21.rrd:query_srv:MAX  LINE2:query_srv4#912925:'SRV Type                  ' AREA:query_srv4#91292533:'' GPRINT:query_srv4:LAST:%6.2lf%s GPRINT:query_srv4min:MIN:%6.2lf%s GPRINT:query_srv4max:MAX:%6.2lf%s GPRINT:query_srv4:AVERAGE:'%6.'.2.'lf%s\n' COMMENT:'\n' --daemon unix:/var/run/rrdcached.sock

RRDTool Output
ERROR: invalid format string '%6..2.lf%s\n' (should match '^(?:[^%]+|%%)*%[-+ 0#]?[0-9]*(?:[.][0-9]+)?l[eEfFgG](?:[^%]+|%%)*(?:%[sS])?(?:[^%]+|%%)*$')