value of range expects range of ip addresses

RouterOS Scripting
1

does anyone know why does this result in an error?

:for x from=1 to=2 do={ /ip firewall mangle add chain=postrouting dst-address=(10.0.0. . $x
) action=mark-packet new-packet-mark=( D0_ . $x ) passthrough=no }



interrupted
value of range expects range of ip addresses


v3.10


thanks

2 
:for x from=1 to=2 do={ /ip firewall mangle add chain=postrouting dst-address="10.0.0.$x" action=mark-packet new-packet-mark="D0_$x" passthrough=no }
3

OMG! v3.10!!!



thanks!