java.lang.NullPointerException: This exception has no message.

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Exception in -nMutations JRegion -aaMutations JRegion

This exception has no message.

java.lang.NullPointerException	at com.milaboratory.core.Range.contains(Range.java:169)	at com.milaboratory.mixcr.export.FeatureExtractors$MutationsExtractor.extractValue(FeatureExtractors.java:116)	at com.milaboratory.mixcr.export.FeatureExtractors$MutationsExtractor.extractValue(FeatureExtractors.java:86)	at com.milaboratory.mixcr.export.FieldWithParameters$1.extractValue(FieldWithParameters.java:49)	at com.milaboratory.mixcr.export.InfoWriter.put(InfoWriter.java:82)	at com.milaboratory.mixcr.cli.ActionExportClones$ExportClones.run(ActionExportClones.java:151)	at com.milaboratory.mixcr.cli.ActionExportClones.go0(ActionExportClones.java:76)	at com.milaboratory.mixcr.cli.ActionExport.go(ActionExport.java:52)	at com.milaboratory.cli.JCommanderBasedMain.main(JCommanderBasedMain.java:147)	at com.milaboratory.mixcr.cli.Main.main(Main.java:113)