org.mvel.ConversionException: unable to resolve property: cannot convert <> to a numeric type

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unable to resolve property: cannot convert <> to a numeric type
org.mvel.ConversionException: unable to resolve property: cannot convert <> to a numeric type
at org.mvel.math.IEEEFloatingPointMath.getBigDecimalFromType(IEEEFloatingPointMath.java:424)
at org.mvel.math.IEEEFloatingPointMath._doOperations(IEEEFloatingPointMath.java:87)
at org.mvel.math.IEEEFloatingPointMath.doOperation(IEEEFloatingPointMath.java:43)
at org.mvel.util.ParseTools.doOperations(ParseTools.java:854)
at org.mvel.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:21)
at org.mvel.ExecutableAccessor.getValue(ExecutableAccessor.java:45)
at org.mvel.ast.IfNode.getReducedValueAccelerated(IfNode.java:31)
at org.mvel.ExecutableAccessor.getValue(ExecutableAccessor.java:50)
at org.mvel.MVEL.executeExpression(MVEL.java:271)
at com.capeclear.mediation.InternalUtils.evaluateExpression(InternalUtils.java:630)
at com.capeclear.assembly.impl.AssemblyUtils.evaluateExpression(AssemblyUtils.java:1424)
at com.capeclear.mediation.impl.mediators.EvalStep.process(EvalStep.java:82)
at com.capeclear.mediation.impl.MediationStepDestinationImpl.processRequest(MediationStepDestinationImpl.java:128)
at com.capeclear.mediation.impl.cc.MediationTube.doProcessRequest(MediationTube.java:140)
at com.capeclear.mediation.impl.cc.MediationTube.processRequest(MediationTube.java:96)
at com.capeclear.mediation.impl.cc.MediationTube.processRequest(MediationTube.java:35)
at com.sun.tubes.Fiber.__doRun(Fiber.java:602)
at com.sun.tubes.Fiber._doRun(Fiber.java:556)
at com.sun.tubes.Fiber.doRun(Fiber.java:541)
at com.sun.tubes.Fiber.runSync(Fiber.java:435)
at com.capeclear.mediation.impl.DefaultMediationMessageProcessor.doProcessMessage(DefaultMediationMessageProcessor.java:473)
at com.capeclear.mediation.impl.DefaultMediationMessageProcessor.process(DefaultMediationMessageProcessor.java:308)
at com.capeclear.transport.impl.vm.LocalOutAssemblyEndpoint.processRequest(LocalOutTransport.java:507)
at com.capeclear.transport.impl.vm.LocalOutTransport.processRequest(LocalOutTransport.java:283)
at com.capeclear.mediation.impl.cc.MediationTube.doProcessRequest(MediationTube.java:140)
at com.capeclear.mediation.impl.cc.MediationTube.processRequest(MediationTube.java:96)
at com.capeclear.mediation.impl.cc.MediationTube.processRequest(MediationTube.java:35)
at com.sun.tubes.Fiber.__doRun(Fiber.java:602)
at com.sun.tubes.Fiber._doRun(Fiber.java:556)
at com.sun.tubes.Fiber.doRun(Fiber.java:541)
at com.sun.tubes.Fiber.runSync(Fiber.java:435)
at com.capeclear.mediation.impl.DefaultMediationMessageProcessor.doProcessMessage(DefaultMediationMessageProcessor.java:473)
at com.capeclear.mediation.impl.DefaultMediationMessageProcessor.process(DefaultMediationMessageProcessor.java:308)
at com.workday.mediation.slave.runtime.SlaveRequestProcessor$1.run(SlaveRequestProcessor.java:199)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

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