Adding electric field to selected logic volume

Geometry, Fields and Transportation
4

Last message if anyone needs the solution, i also had to change the equation type for the local field, as follows :

    G4FieldBuilder *fieldBuilder = G4FieldBuilder::Instance();
    //Defining local field parameters
    auto localFieldParameters = fieldBuilder->CreateFieldParameters("logicDetector");
    localFieldParameters->SetFieldType(kElectroMagnetic);
    localFieldParameters->SetEquationType(kEqElectroMagnetic);
    //Using field builder to set up the field
    fieldBuilder->SetLocalField(elField, logicDetector);

Thank you @ivana for your tip !