Here is another error reported by a TRACER user (line 16).
START TO PROCESS LEVEL 1 (PRE-PROCESSING)
Preprocessing baseform graph in data/corpora/LLCT2/LLCT2.lemma ...
Total number of loaded word forms is 749
eu.etrap.tracer.TracerException: java.lang.ArrayIndexOutOfBoundsException: 1
at eu.etrap.tracer.preprocessing.graph.AbstractWordGraphHandler.loadInputFile(AbstractWordGraphHandler.java:136)
at eu.etrap.tracer.preprocessing.graph.BaseFormWordGraphPreprocessingImpl.preprocessing(BaseFormWordGraphPreprocessingImpl.java:48)
at eu.etrap.tracer.preprocessing.WordGraphPreparer.prepareBaseformGraph(WordGraphPreparer.java:107)
at eu.etrap.tracer.preprocessing.WordGraphPreparer.prepare(WordGraphPreparer.java:70)
at eu.etrap.tracer.AbstractTracerFrameWork.process(AbstractTracerFrameWork.java:151)
at eu.etrap.tracer.Tracer.process(Tracer.java:56)
at eu.etrap.tracer.Tracer.main(Tracer.java:69)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 1
at eu.etrap.tracer.preprocessing.graph.AbstractWordGraphHandler.loadInputFile(AbstractWordGraphHandler.java:113)
... 6 more
Message: java.lang.ArrayIndexOutOfBoundsException: 1
As this error message indicates in line 3, the source of the problem is the .lemma file. In this particular use case, five entries in the file were missing one of three columns of data required. Adding the missing information in the third column fixed the issue.
