java.lang.NumberFormatException: For input string: "a"

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You try to parse a String that contains non-numeric characters to an int. The string must contain decimal characters only, optionally beginning with a + or - sign.

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java.lang.NumberFormatException: For input string: "a"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:580)
at java.lang.Integer.parseInt(Integer.java:615)
at com.thoughtworks.gauge.execution.StringToIntegerConverter.convert(TypeConverter.java:30)
at com.thoughtworks.gauge.execution.StepExecutionStage.executeStepMethod(StepExecutionStage.java:96)
at com.thoughtworks.gauge.execution.StepExecutionStage.executeStep(StepExecutionStage.java:80)
at com.thoughtworks.gauge.execution.StepExecutionStage.execute(StepExecutionStage.java:61)
at com.thoughtworks.gauge.execution.AbstractExecutionStage.executeNext(AbstractExecutionStage.java:24)
at com.thoughtworks.gauge.execution.HookExecutionStage.execute(HookExecutionStage.java:42)
at com.thoughtworks.gauge.execution.ExecutionPipeline.start(ExecutionPipeline.java:31)
at com.thoughtworks.gauge.processor.ExecuteStepProcessor.process(ExecuteStepProcessor.java:34)
at com.thoughtworks.gauge.connection.MessageDispatcher.dispatchMessages(MessageDispatcher.java:72)
at com.thoughtworks.gauge.GaugeRuntime.main(GaugeRuntime.java:37)

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