Adding timestamp via rule - long error message...can't decipher

Setup, Configuration and Use Scripts & Rules
1

I have a rule set up to just add a time stamp when a sensor sends an update. I get an error when it runs. I’m not sure where to even start to decipher the error. The rule is:

rule "sump node updated"
when
   Item sumpBattery received update
then
   postUpdate(sumpLastUpdate, new DateTimeType())
end

The site map entry is:

Text label="Last Update" icon="firstfloor"{
   Text    item=sumpLastUpdate
}

The item entry is:

DateTime        sumpLastUpdate  "Sump Last Update: [%1$tA, %1$td.%1$tm.%1$tY %1$tT]"

…and here is the error:

2016-11-21 21:04:56.094 [ERROR] [o.o.c.s.ScriptExecutionThread ] - Error during the execution of rule 'sump node updated'
java.lang.NullPointerException: null
	at org.eclipse.xtext.common.types.util.JavaReflectAccess.getRawType(JavaReflectAccess.java:107) ~[na:na]
	at org.eclipse.xtext.common.types.util.JavaReflectAccess.getConstructor(JavaReflectAccess.java:90) ~[na:na]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._evaluateConstructorCall(XbaseInterpreter.java:511) ~[na:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_65]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_65]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_65]
	at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_65]
	at org.eclipse.xtext.util.PolymorphicDispatcher.invoke(PolymorphicDispatcher.java:291) ~[na:na]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:218) ~[na:na]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.evaluateArgumentExpressions(XbaseInterpreter.java:751) ~[na:na]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._featureCallOperation(XbaseInterpreter.java:712) ~[na:na]
	at sun.reflect.GeneratedMethodAccessor40.invoke(Unknown Source) ~[na:na]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_65]
	at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_65]
	at org.eclipse.xtext.util.PolymorphicDispatcher.invoke(PolymorphicDispatcher.java:291) ~[na:na]
	at org.openhab.model.script.interpreter.ScriptInterpreter.internalFeatureCallDispatch(ScriptInterpreter.java:69) ~[na:na]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._evaluateAbstractFeatureCall(XbaseInterpreter.java:658) ~[na:na]
	at sun.reflect.GeneratedMethodAccessor39.invoke(Unknown Source) ~[na:na]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_65]
	at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_65]
	at org.eclipse.xtext.util.PolymorphicDispatcher.invoke(PolymorphicDispatcher.java:291) ~[na:na]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:218) ~[na:na]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._evaluateBlockExpression(XbaseInterpreter.java:321) ~[na:na]
	at sun.reflect.GeneratedMethodAccessor51.invoke(Unknown Source) ~[na:na]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_65]
	at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_65]
	at org.eclipse.xtext.util.PolymorphicDispatcher.invoke(PolymorphicDispatcher.java:291) ~[na:na]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:218) ~[na:na]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.evaluate(XbaseInterpreter.java:204) ~[na:na]
	at org.openhab.model.script.internal.engine.ScriptImpl.execute(ScriptImpl.java:59) ~[na:na]
	at org.openhab.core.scriptengine.ScriptExecutionThread.run(ScriptExecutionThread.java:44) ~[na:na]
2

Try using the method rather than the action.

 sumpLastUpdate.postUpdate(new DateTimeType)
3

Thank you for that. I changed it but I was still getting the error. Then I realized that I was missing this at the top:

import org.openhab.core.library.types.*

Now it’s working :slight_smile: