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[Orekit Users] estimation of flow rate parameterDriver

Hello,
 
I am trying to upgrade my estimation algorithm by adding parameterDrivers.
ConstantThrustManeuver.THRUST driver works well but when I try to estimate ConstantThrustManeuver.FLOW_RATE, the estimation process stops at the first iteration.
I have seen in ConstantThrustManeuver that Orekit’s flow rate is defined negatively whereas the flow rate parameter driver is declared as a positive number :
 
“parametersDrivers[1] = new ParameterDriver(FLOW_RATE, flowRate, FLOW_RATE_SCALE,  0.0, Double.POSITIVE_INFINITY);”
 
Can it be the source of my problem ?
Cordially,
 
Quentin
 
 
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