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Why does the Precision and Generalization have a value of "0.00000"?
I have used "Alpha Miner"(or Heuristics Miner) plugin to get a Petri Net, then I exported the Net and used the "Align Log And Model for Repair (find loops)“ plugin to get "PNRepResult" , and finally used the "Measure Precision/Generalization" plugin to get this two quality dimensions. However, Some precision and generalization results are zeros, why it appeared?