NullPointerException at NamedQuey for Insert

Ignition
1

Hello,

I’m trying to insert data at a SQL, using a NamedQuery, but showing NullPointer, but can’t see the error:

This is the code at ValueChange script:

if (currentValue.value != previousValue.value and currentValue.value == 6):
		line = system.tag.getTagValue("[.]WorkGroup")
		station = system.tag.getTagValue("[.]Station Number")
		startWork = system.date.parse(system.tag.getTagValue("[.]Start Work"))
		endWork = system.date.parse(system.date.now())
		serialNumber = system.tag.getTagValue("[.]Serial Number")
		totalTakt = system.tag.getTagValue("[.]Counter Station")
		amesUser = "NA"
		taktLine = system.tag.getTagValue("[.]Line Takt Goal")
		params = {"LINE":line,"STATION":station,"START_WORK":startWork,"END_WORK":endWork,"SERIAL_NUMBER":serialNumber,"TOTAL_TAKT":totalTakt,"AMES_USER":amesUser,"TAKT_LINE":taktLine}
		result = system.db.runNamedQuery("Insert Takt History", params)
		counter = system.tag.getTagValue("[.]Station Actual")
		counter = counter + 1
		system.tag.writeToTag("[.]Station Actual", counter)
		
	if (currentValue.value != previousValue.value and currentValue.value == 2):
		system.tag.writeToTag("[.]Start Work", system.date.now())

This is the print of data at UDT

But show the error at Ignition:

com.inductiveautomation.ignition.common.script.JythonExecException: Traceback (most recent call last): File "", line 20, in valueChanged at com.inductiveautomation.ignition.gateway.script.GatewayDBUtilities.runNamedQuery(GatewayDBUtilities.java:354) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) java.lang.NullPointerException: java.lang.NullPointerException

at org.python.core.Py.JavaError(Py.java:495)

at org.python.core.Py.JavaError(Py.java:488)

at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:188)

at com.inductiveautomation.ignition.common.script.ScriptManager$ReflectedInstanceFunction.__call__(ScriptManager.java:431)

at org.python.core.PyObject.__call__(PyObject.java:404)

at org.python.core.PyObject.__call__(PyObject.java:408)

at org.python.pycode._pyx58.valueChanged$1(:26)

at org.python.pycode._pyx58.call_function()

at org.python.core.PyTableCode.call(PyTableCode.java:165)

at org.python.core.PyBaseCode.call(PyBaseCode.java:301)

at org.python.core.PyFunction.function___call__(PyFunction.java:376)

at org.python.core.PyFunction.__call__(PyFunction.java:371)

at org.python.core.PyFunction.__call__(PyFunction.java:361)

at org.python.core.PyFunction.__call__(PyFunction.java:356)

at com.inductiveautomation.ignition.common.script.ScriptManager.runFunction(ScriptManager.java:649)

at com.inductiveautomation.ignition.common.sqltags.scripts.TagScriptManager$FunctionInvokerImpl.run(TagScriptManager.java:493)

at com.inductiveautomation.ignition.common.sqltags.scripts.AbstractTagScript.invoke(AbstractTagScript.java:33)

at com.inductiveautomation.ignition.common.sqltags.scripts.TagScriptManager$Task.invoke(TagScriptManager.java:442)

at com.inductiveautomation.ignition.common.sqltags.scripts.TagScriptManager$TagScriptDispatcher.run(TagScriptManager.java:405)

at com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine$ThrowableCatchingRunnable.run(BasicExecutionEngine.java:518)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at java.lang.Thread.run(Thread.java:748)

Caused by: org.python.core.PyException: Traceback (most recent call last): File "", line 20, in valueChanged at com.inductiveautomation.ignition.gateway.script.GatewayDBUtilities.runNamedQuery(GatewayDBUtilities.java:354) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) java.lang.NullPointerException: java.lang.NullPointerException

... 27 common frames omitted

Caused by: java.lang.NullPointerException: null

at com.inductiveautomation.ignition.gateway.script.GatewayDBUtilities.runNamedQuery(GatewayDBUtilities.java:354)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:186)

... 24 common frames omitted

Could you help with this?

Thanks

2

When run on the gateway (ie, from a tag event/change script), system.db.runNamedQuery requires that you specify the project name that contains the named query as the first argument.

1 Like
3

I’m not sure what version of Ignition you are using, but I believe you should be using

system.tag.read(tag).value 

system.tag.write(tag,value)
1 Like
4

Updated the code with tag.read. Also the NamedQuery is at local project.
I not understand about the specify project name, because the script is inside a Tag Change event of UDT:

	if (currentValue.value != previousValue.value and currentValue.value == 6):
		line = system.tag.read("[.]WorkGroup").value
		station = system.tag.read("[.]Station Number").value
		startWork = system.tag.read("[.]Start Work").value
		endWork = system.date.now()
		serialNumber = system.tag.read("[.]Serial Number").value
		totalTakt = system.tag.read("[.]Counter Station").value
		amesUser = "NA"
		taktLine = system.tag.read("[.]Line Takt Goal").value
		params = {"LINE":line,"STATION":station,"START_WORK":startWork,"END_WORK":endWork,"SERIAL_NUMBER":serialNumber,"TOTAL_TAKT":totalTakt,"AMES_USER":amesUser,"TAKT_LINE":taktLine}
		result = system.db.runNamedQuery("Insert Takt History", params)
		counter = system.tag.read("[.]Station Actual").value
		counter = counter + 1
		system.tag.write("[.]Station Actual", counter)
		
	if (currentValue.value != previousValue.value and currentValue.value == 2):
		system.tag.write("[.]Start Work", system.date.now())

2018-12-03 15_28_34-JDHMI_BZ - Ignition-PROD_BZ -FINDBZSHPFLR1 - Ignition Designer.png1308×860 74.6 KB

The SQL Table Script

CREATE TABLE [dbo].[STATION_TAKT_HISTORY2](
	[ID] [int] IDENTITY(1,1) NOT NULL,
	[LINE] [nchar](20) NULL,
	[STATION] [nchar](20) NULL,
	[START_WORK] [datetime] NULL,
	[END_WORK] [datetime] NULL,
	[SERIAL_NUMBER] [nchar](17) NULL,
	[TOTAL_TAKT] [real] NULL,
	[AMES_USER] [nchar](10) NULL,
	[TAKT_LINE] [real] NULL
) ON [PRIMARY]
GO

Named Query

2018-12-03 15_23_54-JDHMI_BZ - Ignition-PROD_BZ -FINDBZSHPFLR1 - Ignition Designer.png1657×433 15.1 KB

Same error at Log:

com.inductiveautomation.ignition.common.script.JythonExecException: Traceback (most recent call last): File "", line 12, in valueChanged at com.inductiveautomation.ignition.gateway.script.GatewayDBUtilities.runNamedQuery(GatewayDBUtilities.java:354) at sun.reflect.GeneratedMethodAccessor119.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) java.lang.NullPointerException: java.lang.NullPointerException

at org.python.core.Py.JavaError(Py.java:495)

at org.python.core.Py.JavaError(Py.java:488)

at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:188)

at com.inductiveautomation.ignition.common.script.ScriptManager$ReflectedInstanceFunction.__call__(ScriptManager.java:431)

at org.python.core.PyObject.__call__(PyObject.java:404)

at org.python.core.PyObject.__call__(PyObject.java:408)

at org.python.pycode._pyx62.valueChanged$1(:18)

at org.python.pycode._pyx62.call_function()

at org.python.core.PyTableCode.call(PyTableCode.java:165)

at org.python.core.PyBaseCode.call(PyBaseCode.java:301)

at org.python.core.PyFunction.function___call__(PyFunction.java:376)

at org.python.core.PyFunction.__call__(PyFunction.java:371)

at org.python.core.PyFunction.__call__(PyFunction.java:361)

at org.python.core.PyFunction.__call__(PyFunction.java:356)

at com.inductiveautomation.ignition.common.script.ScriptManager.runFunction(ScriptManager.java:649)

at com.inductiveautomation.ignition.common.sqltags.scripts.TagScriptManager$FunctionInvokerImpl.run(TagScriptManager.java:493)

at com.inductiveautomation.ignition.common.sqltags.scripts.AbstractTagScript.invoke(AbstractTagScript.java:33)

at com.inductiveautomation.ignition.common.sqltags.scripts.TagScriptManager$Task.invoke(TagScriptManager.java:442)

at com.inductiveautomation.ignition.common.sqltags.scripts.TagScriptManager$TagScriptDispatcher.run(TagScriptManager.java:405)

at com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine$ThrowableCatchingRunnable.run(BasicExecutionEngine.java:518)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at java.lang.Thread.run(Thread.java:748)

Caused by: org.python.core.PyException: Traceback (most recent call last): File "", line 12, in valueChanged at com.inductiveautomation.ignition.gateway.script.GatewayDBUtilities.runNamedQuery(GatewayDBUtilities.java:354) at sun.reflect.GeneratedMethodAccessor119.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) java.lang.NullPointerException: java.lang.NullPointerException

... 27 common frames omitted

Caused by: java.lang.NullPointerException: null

at com.inductiveautomation.ignition.gateway.script.GatewayDBUtilities.runNamedQuery(GatewayDBUtilities.java:354)

at sun.reflect.GeneratedMethodAccessor119.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:186)

... 24 common frames omitted
5

Version of Ignition 7.9.10

6

Right - like I said, when running from a tag event script, named queries require you to specify a project name.
Tags are always executing - they reside on the gateway itself, not inside any particular project, so your UDT, its member tags, and all of your other tags are unaware of your "local" project. If you create a new project and open the tag browser, you will see the exact same tags. You must specify a project name when calling a named query from the global scope, to tell the gateway which project to find the named query in.

2 Likes
7

Right, now I catch you.

Changed the script to:

		result = system.db.runNamedQuery("JDHMI_BZ","Insert Takt History", params)

Works fine now. Thanks for help and clarify.

1 Like