ParameterConverters - NumberFormatException exception

java.lang.NumberFormatException: multiple points
at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1084)
at java.lang.Double.parseDouble(Double.java:510)
at java.text.DigitList.getDouble(DigitList.java:151)
at java.text.DecimalFormat.parse(DecimalFormat.java:1303)
at java.text.NumberFormat.parse(NumberFormat.java:331)
at org.jbehave.core.steps.ParameterConverters$NumberConverter.convertValue(ParameterConverters.java:231)
at org.jbehave.core.steps.ParameterConverters.convert(ParameterConverters.java:141)
at org.jbehave.core.steps.StepCreator.convertParameters(StepCreator.java:198)
at org.jbehave.core.steps.StepCreator.access$800(StepCreator.java:27)
at org.jbehave.core.steps.StepCreator$ParameterizedStep.parametriseStep(StepCreator.java:467)
at org.jbehave.core.steps.StepCreator$ParameterizedStep.perform(StepCreator.java:425)
at org.jbehave.core.embedder.StoryRunner$FineSoFar.run(StoryRunner.java:436)
at org.jbehave.core.embedder.StoryRunner.runStepsWhileKeepingState(StoryRunner.java:419)
at org.jbehave.core.embedder.StoryRunner.runScenarioSteps(StoryRunner.java:384)
at org.jbehave.core.embedder.StoryRunner.runIt(StoryRunner.java:259)
at org.jbehave.core.embedder.StoryRunner.run(StoryRunner.java:181)
at org.jbehave.core.embedder.StoryRunner.run(StoryRunner.java:164)
at org.jbehave.core.embedder.Embedder$EnqueuedStory.call(Embedder.java:620)
at org.jbehave.core.embedder.Embedder$EnqueuedStory.call(Embedder.java:584)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)