Using Marlin Reco

We ran our own simulations locally, using the PPE batch farm, and now we want to do reconstruction. This wiki explains how to do this, step by step.

Required processors

For full reconstruction, one needs the following processors:

    <execute>
        <processor name="MyMaterialDB" />
        <processor name="MyFTDDigiProcessor" />
        <processor name="MyTPCDigiProcessor" />
        <processor name="MyVTXDigiProcessor" />
        <processor name="MySimpleCaloDigi" />
        <processor name="MyClusterCheater5_3" /> 
        <processor name="MyTrackCheaterWithFit" />
        <processor name="MyWolf" />
        <processor name="MySelectReconstructedParticle" />
        <processor name="MyLCIOOutputProcessor" />
    </execute>

This list was taken from the example steering file cheattracks+jetfind.xml included in the LCFIVertex package (in ilcsoft/v01-14/LCFIVertex/v00-06-01/steering/).

Make sure all needed processors are compiled. See this wiki for details on how to recompile MarlinReco.

Make sure that the input and output collection names match between consecutive processors and also match your naming convention.

Problems

We noticed that the GearOutput.xml produced when running our simulation was incomplete and one would get this type of errors:

 ***********************************************
 A runtime error occured - (uncaught exception):
      gear::UnknownParameterException: StripLineProperties_dEdx
 Marlin will have to be terminated, sorry.
 ***********************************************

see this for example

-- DanProtopopescu - 2013-12-06