Graph template Unix - Ping Latency nan

[oneDot]

Hi all,

I would like to use graph template Unix - Ping Latency.

Cacti Server v1.2.19
Edition Windows Server 2022 Standard
Version 21H2

In graph appears nan values.

Please give me a hint about proper operation in windows environment.

RRDtool Command:
c:/rrdtool/rrdtool.exe graph - \
--imgformat=PNG \
--start="-86400" \
--end="-300" \
--pango-markup \
--title="PING_www.google.com - Ping Latency" \
--vertical-label="milliseconds" \
--slope-mode \
--base=1000 \
--height=200 \
--width=700 \
--tabwidth "40" \
--alt-autoscale-max \
--lower-limit="0" \
COMMENT:"From 2022-04-25 12\:47\:54 To 2022-04-26 12\:42\:54\c" \
COMMENT:" \n" \
--color BACK#F3F3F3 \
--color CANVAS#FDFDFD \
--color SHADEA#CBCBCB \
--color SHADEB#999999 \
--color FONT#000000 \
--color AXIS#2C4D43 \
--color ARROW#2C4D43 \
--color FRAME#2C4D43 \
--border 1 --font TITLE:11:"Arial" \
--font AXIS:8:"Arial" \
--font LEGEND:8:"Courier" \
--font UNIT:8:"Arial" \
--font WATERMARK:6:"Arial" \
--slope-mode \
--watermark "Generated by Cacti®" \
DEF:a="C\:/inetpub/wwwroot/cacti/rra/ping_www_google_com_ping_186.rrd":"ping":MAX \
DEF:b="C\:/inetpub/wwwroot/cacti/rra/ping_www_google_com_ping_186.rrd":"ping":AVERAGE \
LINE1:a#FFF200FF: \
AREA:b#FFF2007F: \
GPRINTLAST:"Current\:%8.2lf %s" \
GPRINTAVERAGE:"Average\:%8.2lf %s" \
GPRINTMAX:"Maximum\:%8.2lf %s\n"
RRDtool Command lengths = 1054 charaters.
RRDtool Says:
OK