I’m attempting to store a custom list into a Vision Client Dataset tag. The following script seems to work, and I can see the data loaded into the tag:
myList = ['abc','def','foo']
headers = ['bar']
rows = [[x] for x in myList] # one row per item
ds = system.dataset.toDataSet(headers, rows)
system.tag.writeBlocking('[client]myClientTag', ds)
However, when attempting to save, I get an error.
If I ‘touch’ the data in the client tag manually (e.g., double click on any value and edit it manually), I can save without issue.
Here's the entire error message
com.inductiveautomation.ignition.common.xmlserialization.SerializationException: Error during serialization for property 'children' on object '[ClientTagFolder]com.inductiveautomation.factorypmi.application.sqltags.ClientTagFolder@130b72e2'
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.serializeProperties(DefaultObjectSerializationDelegate.java:153)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.serialize(DefaultObjectSerializationDelegate.java:180)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.XMLSerializationContext.serialize(XMLSerializationContext.java:53)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.XMLSerializer.serialize(XMLSerializer.java:532)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.XMLSerializer.serializeBinary(XMLSerializer.java:513)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.XMLSerializer.serializeBinary(XMLSerializer.java:503)
at com.inductiveautomation.factorypmi.designer.model.VisionDesignerImpl.serializeProjectResource(VisionDesignerImpl.java:1086)
at com.inductiveautomation.factorypmi.designer.model.VisionDesignerImpl.syncAppToProject(VisionDesignerImpl.java:1160)
at com.inductiveautomation.factorypmi.designer.model.VisionDesignerImpl.notifyProjectSaveStart(VisionDesignerImpl.java:651)
at com.inductiveautomation.ignition.designer.IgnitionDesigner.lambda$getCommitTasks$46(IgnitionDesigner.java:1667)
at com.inductiveautomation.ignition.designer.IgnitionDesigner.lambda$commitAll$41(IgnitionDesigner.java:1618)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(Unknown Source)
at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(Unknown Source)
at java.base/java.util.stream.AbstractPipeline.copyInto(Unknown Source)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source)
at java.base/java.util.stream.AbstractPipeline.evaluate(Unknown Source)
at java.base/java.util.stream.ReferencePipeline.reduce(Unknown Source)
at com.inductiveautomation.ignition.designer.IgnitionDesigner.commitAll(IgnitionDesigner.java:1626)
at com.inductiveautomation.ignition.designer.IgnitionDesigner.handleSave(IgnitionDesigner.java:1377)
at com.inductiveautomation.ignition.designer.IgnitionDesigner$Handler.lambda$handleSaveAction$12(IgnitionDesigner.java:2668)
at com.inductiveautomation.ignition.client.util.gui.progress.Task$FunctionWrapper.apply(Task.java:247)
at com.inductiveautomation.ignition.client.util.gui.progress.Task$FunctionWrapper.apply(Task.java:237)
at com.inductiveautomation.ignition.client.util.gui.progress.Task.lambda$runInternal$3(Task.java:205)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)
Caused by: com.inductiveautomation.ignition.common.xmlserialization.SerializationException: Unable to create clean copy of class com.inductiveautomation.ignition.common.script.builtin.PyDataset
at com.inductiveautomation.ignition.common.xmlserialization.serialization.XMLSerializer.getCleanCopy(XMLSerializer.java:598)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.XMLSerializationContext.getCleanCopy(XMLSerializationContext.java:75)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.serializeProperties(DefaultObjectSerializationDelegate.java:143)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.serialize(DefaultObjectSerializationDelegate.java:180)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.XMLSerializationContext.serialize(XMLSerializationContext.java:53)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.writeConstructor(DefaultObjectSerializationDelegate.java:227)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.serializeConstructor(DefaultObjectSerializationDelegate.java:218)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.serialize(DefaultObjectSerializationDelegate.java:176)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.XMLSerializationContext.serialize(XMLSerializationContext.java:53)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.writeCall(DefaultObjectSerializationDelegate.java:90)
at com.inductiveautomation.factorypmi.designer.xmlserialization.ProjectTagDelegate.serializeProperties(ProjectTagDelegate.java:39)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.serialize(DefaultObjectSerializationDelegate.java:180)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.XMLSerializationContext.serialize(XMLSerializationContext.java:53)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.delegates.ArrayListDelegate.serialize(ArrayListDelegate.java:23)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.delegates.ArrayListDelegate.serialize(ArrayListDelegate.java:17)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.XMLSerializationContext.serialize(XMLSerializationContext.java:53)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.writeCall(DefaultObjectSerializationDelegate.java:90)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.writeCall(DefaultObjectSerializationDelegate.java:77)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.doProperty(DefaultObjectSerializationDelegate.java:130)
at com.inductiveautomation.ignition.common.xmlserialization.serialization.DefaultObjectSerializationDelegate.serializeProperties(DefaultObjectSerializationDelegate.java:151)
... 29 more
Ignition v8.3.2 (b2025120210)
Java: Azul Systems, Inc. 17.0.16