Strange behavior in allocation

[kmolima]

Allocated sequential tasks to different vehicles (check payload requirements)
Iros18 rendez-vous running example log:

Selected nodes: { lauv-noptilus-3 lauv-noptilus-2 lauv-noptilus-1 }
lauv-noptilus-3 is available!
lauv-noptilus-2 is available!
lauv-noptilus-1 is available!
x8-02 is available!
Available nodes: 1
id=x8-02 type=UAV
Matching requirement: id=,type=UAV,payload=,area=area((41,185000,-8,706200,0,000000) <> 10000,000000)
Requirement met by node x8-02
Selected nodes: { x8-02 }
Task survey1 allocated node lauv-noptilus-3.
Task sk1 allocated node lauv-noptilus-1.
Task survey2 allocated node lauv-noptilus-2.
Task sk2 allocated node lauv-noptilus-2.
Task survey3 could not allocate necessary nodes.
Unexpected exception ... pt.lsts.dolphin.runtime.EnvironmentException : No vehicles to run task! !
Script '/home/lsts/workspace/neptus/conf/dolphin/iros18.nvl' completed