Exec endpoint not working correctly with recipientList

Hi there!

Experimenting with the exec endpoint I found out that it works perfectly (setting CamelExecExitValue header) when invoked with hardcoded args, such as:

<camel:to uri="exec:///opt/ibm/ondemand/V9.0/bin/arsload?args=-f -g FONDO -h 192.168.10.77 -u admin -p password /tmp/ID-MacBook-Pro-de-Gonzalo-Vasquez-local-64241-1408030173940-0-1" />

But fails silently on setting headers (CamelExecExitValue not set, and blank body )when invoked as a receipientList endpoint, with variable parameters such as:

<camel:recipientList>
<camel:simple>
exec://{{cmod.arsLoad}}?args=-f -g ${in.header.appGroup} -h {{cmod.host}} -u {{cmod.username}} -p {{cmod.password}} {{tmp.path}}/${id}</camel:simple>
</camel:recipientList>

I actually need to use the second approach as the arguments to my command are determined in runtime.

Am I doing something wrong or the recipientList actually removed the expected headers?

PS: This is derived from my previous post at http://camel.465427.n5.nabble.com/Retrieving-EXEC-EXIT-VALUE-from-exec-endpoint-td5755188.html

Regards,

Gonzalo Vasquez