Error message in Rules Execution

Setup, Configuration and Use Scripts & Rules
1

Hi,

currently struggeling with rules - but have no clue why - as they worked ever since a couple of months.

My rule:

import org.openhab.core.library.types.*
import org.openhab.core.persistence.*
import org.openhab.model.script.actions.*
import org.openhab.core.library.types.*
import org.joda.time.*

rule "OG Alles auf"
when
	Item OGUp received update
then
	if (OGUp.state==ON)
		{
			ShuttersOG?.members.forEach(Rollershutter|
   sendCommand(Rollershutter, UP)
	   )
		OGLights?.members.forEach(Switch|
sendCommand(Switch, OFF)
)
postUpdate(OGUp, OFF)
}
end

changing the item state is resulting in the following output in debug log:

18:12:15.600 [DEBUG] [m.r.internal.engine.RuleEngine:305 ] - Executing rule 'OG Alles auf'
18:12:16.969 [INFO ] [openhab.model.script.Dashboard:53 ] - Item OGUp has changed state from OFF to: ON
18:12:20.832 [ERROR] [o.o.c.s.ScriptExecutionThread :50 ] - Error during the execution of rule 'OG Alles auf': Could not invoke method: org.openhab.model.script.actions.BusEvent.sendCommand(java.lang.String,java.lang.String) on instance: null

any idea?

thanks
Karsten

2

Change your sendCommands to

Rollershutter.sendCommand(UP)
Switch.sendCommand(OFF)

or

sendCommand(Rollershutter.name, UP)
sendCommand(Switch.name, OFF)
3

Is it possible to have an item named “Rollershutter” or “Switch”? Wouldn’t they be reserved names in an items file?

4

I think you can because in the rules the class names are actually SwitchType and RollershutterType I believe.

I just typed var Switch = null into Designer and it had no problem with it.

5

But can you make a Switch item like

Switch Switch "Switch"

In an items file?

6

In this case he is iterating over the members of a group so Rollershutter and Switch are just variables.

ShuttersOG?.members.forEach(Rollershutter|  sendCommand(Rollershutter, UP))

OGLights?.members.forEach(Switch| sendCommand(Switch, OFF))
7

Ah, thanks. I missed that.