Please try to swap

<initialValueEx pression><![CDATA[$P{InitialValue }]]></initialValueExp ression>
<variableExpres sion><![CDATA[$F{flight_fligh tid}]]></variableExpress ion>

into

<variableExpres sion><![CDATA[$F{flight_fligh tid}]]></variableExpress ion>
<initialValueEx pression><![CDATA[$P{InitialValue }]]></initialValueExp res...