#1 TaxoBuilder halts with following message (step 4)

[Anonymous]

253
java.lang.AbstractMethodError
at
conexp.core.calculationstrategies.DepthSearchCalculator.makeDepthSear
chLatticeElement(DepthSearchCalculator.java:185)
at
conexp.core.calculationstrategies.DepthSearchCalculator.performDepthS
earchCalculationOfLattice(DepthSearchCalculator.java:65)
at
conexp.core.calculationstrategies.BasicDepthSearchCalculator.buildLat
tice(BasicDepthSearchCalculator.java:80)
at
conexp.core.registries.FCAEngineImplementation.buildLattice(FCAEngine
Implementation.java:29)
at
edu.unika.aifb.texttoonto.taxobuilder.conexp.LatticeCreator.buildLatt
iceFromMap(Unknown Source)
at
edu.unika.aifb.texttoonto.taxobuilder.algorithm.TaxoBuilder.buildLatt
ice(Unknown Source)
at
edu.unika.aifb.texttoonto.taxobuilder.algorithm.TaxoBuilder.doTaxoBui
ld(Unknown Source)
at
edu.unika.aifb.texttoonto.taxobuilder.ui.TaxoBuilderViewable$10.run(U
nknown Source)