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

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java.lang.NullPointerException:
at osgi.enroute.scheduler.simple.provider.InternalSchedulerImpl.after(InternalSchedulerImpl.java:90)
at osgi.enroute.scheduler.simple.provider.InternalSchedulerImpl.at(InternalSchedulerImpl.java:285)
at osgi.enroute.scheduler.simple.provider.InternalSchedulerImpl.schedule(InternalSchedulerImpl.java:211)
at osgi.enroute.scheduler.simple.provider.InternalSchedulerImpl.schedule(InternalSchedulerImpl.java:269)
at osgi.enroute.scheduler.simple.provider.InternalSchedulerImpl$Cron.(InternalSchedulerImpl.java:296)
at osgi.enroute.scheduler.simple.provider.InternalSchedulerImpl.addSchedule(InternalSchedulerImpl.java:317)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at org.apache.felix.scr.impl.inject.BaseMethod.invokeMethod(BaseMethod.java:224)
at org.apache.felix.scr.impl.inject.BaseMethod.access$500(BaseMethod.java:39)
at org.apache.felix.scr.impl.inject.BaseMethod$Resolved.invoke(BaseMethod.java:617)
at org.apache.felix.scr.impl.inject.BaseMethod.invoke(BaseMethod.java:501)
at org.apache.felix.scr.impl.inject.BindMethod.invoke(BindMethod.java:655)
at org.apache.felix.scr.impl.manager.DependencyManager.doInvokeBindMethod(DependencyManager.java:1722)
at org.apache.felix.scr.impl.manager.DependencyManager.open(DependencyManager.java:1556)
at org.apache.felix.scr.impl.manager.SingleComponentManager.createImplementationObject(SingleComponentManager.java:260)
at org.apache.felix.scr.impl.manager.SingleComponentManager.createComponent(SingleComponentManager.java:108)
at org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:906)
at org.apache.felix.scr.impl.manager.SingleComponentManager.getServiceInternal(SingleComponentManager.java:879)
at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:748)
at org.apache.felix.scr.impl.manager.AbstractComponentManager.enableInternal(AbstractComponentManager.java:674)
at org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:429)
at org.apache.felix.scr.impl.manager.ConfigurableComponentHolder.enableComponents(ConfigurableComponentHolder.java:657)
at org.apache.felix.scr.impl.BundleComponentActivator.initialEnable(BundleComponentActivator.java:341)
at org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:403)
at org.apache.felix.scr.impl.Activator.access$200(Activator.java:54)
at org.apache.felix.utils.extender.AbstractExtender.createExtension(AbstractExtender.java:259)
at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:482)
at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:415)
at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:232)
at org.apache.felix.framework.util.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:913)
at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:834)
at org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:516)
at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4544)
at org.apache.felix.framework.Felix.startBundle(Felix.java:2166)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at org.apache.felix.gogo.runtime.Reflective.invoke(Reflective.java:137)
at org.apache.felix.gogo.runtime.CommandProxy.execute(CommandProxy.java:82)
at org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:480)
at org.apache.felix.gogo.runtime.Closure.executeStatement(Closure.java:406)
at org.apache.felix.gogo.runtime.Pipe.run(Pipe.java:108)
at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:182)
at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:119)
at org.apache.felix.gogo.shell.Console.run(Console.java:66)
at org.apache.felix.gogo.shell.Shell.console(Shell.java:212)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at org.apache.felix.gogo.runtime.Reflective.invoke(Reflective.java:137)
at org.apache.felix.gogo.runtime.CommandProxy.execute(CommandProxy.java:82)
at org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:480)
at org.apache.felix.gogo.runtime.Closure.executeStatement(Closure.java:406)
at org.apache.felix.gogo.runtime.Pipe.run(Pipe.java:108)
at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:182)
at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:119)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

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