Example for problem in NeuroML2 export

IF.nml

<?xml version="1.0" ?>
<Lems xmlns="http://www.neuroml.org/lems/0.7.3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.neuroml.org/lems/0.7.3 https://raw.githubusercontent.com/LEMS/LEMS/development/Schemas/LEMS/LEMS_v0.7.3.xsd">
  <Include file="LEMSUnitsConstants.xml"/>
  <Include file="Simulation.xml"/>
  <Include file="NeuroML2CoreTypes.xml"/>
  <ComponentType extends="baseCell" name="neurongroup">
    <Property dimension="voltage" name="v0"/>
    <EventPort direction="out" name="spike"/>
    <Exposure dimension="voltage" name="v"/>
    <Dynamics>
      <StateVariable dimension="voltage" exposure="v" name="v"/>
      <TimeDerivative value="(v0 - v) / (10 * ms)" variable="v"/>
      <OnStart/>
      <OnCondition test="v .gt. (10 * mV)">
        <EventOut port="spike"/>
        <StateAssignment value="0*mV" variable="v"/>
      </OnCondition>
    </Dynamics>
  </ComponentType>
  <ComponentType extends="basePopulation" name="neurongroupMulti">
    <Parameter dimension="none" name="N"/>
    <Constant dimension="voltage" name="mVconst" symbol="mVconst" value="1mV"/>
    <Structure>
      <MultiInstantiate componentType="neurongroup" number="N">
        <Assign property="v0" value="20*mVconst * index /  ( n-1 )  "/>
      </MultiInstantiate>
    </Structure>
  </ComponentType>
  <network id="neurongroupMultiNet">
    <Component N="5" id="neurongroupMultipop" type="neurongroupMulti"/>
  </network>
  <Simulation id="sim1" length="1s" step="0.1ms" target="neurongroupMultiNet"/>
  <Target component="sim1"/>
</Lems>

LEMSUnitsConstants.xml

<?xml version="1.0" ?>
<Lems xmlns="http://www.neuroml.org/lems/0.7.3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.neuroml.org/lems/0.7.3 https://raw.githubusercontent.com/LEMS/LEMS/development/Schemas/LEMS/LEMS_v0.7.3.xsd">
  <Constant dimension="conductance" name="nS" symbol="nS" value="1e-09"/>
  <Constant dimension="current" name="pA" symbol="pA" value="1e-12"/>
  <Constant dimension="volume" name="um3" symbol="um3" value="1e-18"/>
  <Constant dimension="area" name="um2" symbol="um2" value="1e-12"/>
  <Constant dimension="length" name="mm" symbol="mm" value="0.001"/>
  <Constant dimension="current" name="nA" symbol="nA" value="1e-09"/>
  <Constant dimension="capacitance" name="uF" symbol="uF" value="1e-06"/>
  <Constant dimension="volume" name="mm3" symbol="mm3" value="1e-09"/>
  <Constant dimension="area" name="mm2" symbol="mm2" value="1e-06"/>
  <Constant dimension="length" name="um" symbol="um" value="1e-06"/>
  <Constant dimension="voltage" name="mV" symbol="mV" value="0.001"/>
  <Constant dimension="capacitance" name="pF" symbol="pF" value="1e-12"/>
  <Constant dimension="conductance" name="uS" symbol="uS" value="1e-06"/>
  <Constant dimension="time" name="ms" symbol="ms" value="0.001"/>
  <Constant dimension="capacitance" name="nF" symbol="nF" value="1e-09"/>
  <Constant dimension="resistance" name="Mohm" symbol="Mohm" value="1000000.0"/>
  <Constant dimension="resistance" name="kohm" symbol="kohm" value="1000.0"/>
  <Constant dimension="current" name="uA" symbol="uA" value="1e-06"/>
</Lems>