How to capture [exec]

[Z W]

Hi

I have a Powershell script that contains the line "exit 2" when ping fails
>From Ant, it's showing

_ping:
     [echo]  Inside _build_ping_alive module
     [exec] Pinging host1 ...
     [exec] success
     [exec] Pinging host2 ...
     [exec] error: 11010 occurred
     [exec] LastExitCode: 0
     [exec] error.count: 0
     [exec] *Result: 1*
How to I capture the 1 with Ant ?
In Ant, I have

<exec dir="." executable="powershell" os="Windows XP" timeout="10000"
failonerror="false"

resultproperty="build_main.debug">

<arg line="./MyPing host2"/>

</exec>
 Thanks

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