How I can change in *tab chart wind speed km/h to m/s. It give always error

After reset to km/h it works again. In other chart the change was no problem!
BR,
Marti
Code: Select all
timeframe=-1M # set total time frame to previous month
res=day1
gtitle=Monthly_Report # name of graph
gheight=450 # height in pixels of graph
gwidth=700 # width in pixels of graph
gtype=table # type of graph
glunit=Date
grunit=%e._%b_%Y_%Hh
gtrim=0
gtablestyle=style="background-color:#fafafa;border:1px_#000000_solid;border-collapse:collapse;border-spacing:2px;"
gtdheadstyle=style="background-color:#336699;border:1px_#000000_solid;font-family:Verdana;font-weight:bold;font-size:12px;text-align:center;color:#FFFFFF;"
gtdstyle=style="border:1px_#CCCCCC_solid;text-align:right;font-family:Verdana,sans-serif,Arial;font-weight:normal;font-size:.7em;color:#404040;background-color:#fafafa;padding-top:4px;padding-bottom:4px;padding-left:8px;padding-right:2px;"
sid0=th* sunit0=°C sname0=Temp<br>Ø ssel0=temp
sid1=th* sunit1=°C sname1=Temp<br>Max ssel1=tempmax
sid2=th* sunit2=°C sname2=Temp<br>Min ssel2=tempmin
sid3=th* sunit3=% sname3=Hum ssel3=hum sprec3=0
sid4=thb* sunit4=hPa sname4=Press ssel4=seapress
sid5=rain* sunit5=mm sname5=Rain ssel5=total
sid6=wind* sunit6=m/s sname6=Wind<br>Ø ssel6=wind sfactor6=1
sid7=wind* sunit7=m/s sname7=Wind<br>Max ssel7=gustmax sfactor7=1
sid8=misc sunit8= sname8=Sunrise ssel8=sunrisestandardlocaltime saddon8=1
sid9=misc sunit9= sname9=Sunset ssel9=sunsetstandardlocaltime saddon9=1
sid10=misc sunit10= sname10=Moon_Phase ssel10=lunarphasetext saddon10=1