# Deserializing event-scripts with Kindling **URL:** \ **Category:** General Discussion\ **Tags:** ignition81, scripting\ **Created:** [September 25, 2025, 5:10pm UTC](https://forum.inductiveautomation.com/t/deserializing-event-scripts-with-kindling/110978 "2025-09-25T17:10:38Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![akivabrookler](https://avatars.discourse-cdn.com/v4/letter/a/41988e/32.png) [@akivabrookler](https://forum.inductiveautomation.com/u/akivabrookler)\ **Post date:** [September 25, 2025, 5:10pm UTC](https://forum.inductiveautomation.com/t/deserializing-event-scripts-with-kindling/110978/1 "2025-09-25T17:10:38Z")
In Ignition 8.1, how can I deserialize event-scripts? I tried to take the data.bin file and gunzip it. After I loaded the gunzipped file into Kindling, I get the following error. Any advice? Invalid STREAM\_MAGIC 0x-26583, should be 0xAC ED java.lang.IllegalArgumentException: Invalid STREAM\_MAGIC 0x-26583, should be 0xAC ED ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [September 25, 2025, 6:28pm UTC](https://forum.inductiveautomation.com/t/deserializing-event-scripts-with-kindling/110978/2 "2025-09-25T18:28:49Z")
After gunzipping you get Java serialized data...but encoded in a special proprietary format. It's going to be close to impossible to read that outside of a Java context - I could add it to Kindling as a best effort kind of thing - it won't be perfect because technically modules can extend that deserialization handling, but it should be possible for platform and base Vision stuff. You ultimately need to invoke `deserializeBinary` on this class, if you're curious/motivated enough to try to extend Kindling to do it, where some base Ignition dependencies are already in scope. > **[XMLDeserializer](https://files.inductiveautomation.com/sdk/javadoc/ignition83/8.3.0/com/inductiveautomation/ignition/common/xmlserialization/deserialization/XMLDeserializer.html)** > > declaration: package: com.inductiveautomation.ignition.common.xmlserialization.deserialization, class: XMLDeserializer ---
**Author:** ![akivabrookler](https://avatars.discourse-cdn.com/v4/letter/a/41988e/32.png) [@akivabrookler](https://forum.inductiveautomation.com/u/akivabrookler)\ **Post date:** [September 26, 2025, 6:33pm UTC](https://forum.inductiveautomation.com/t/deserializing-event-scripts-with-kindling/110978/3 "2025-09-26T18:33:15Z")
I tried using the `deserializeBinary` method and built a .jar executable to take a file as input and to write out the deserialized result. I’m getting runtime errors that seem like the deserializer doesn’t recognize the binary data. Any ideas what I may be doing wrong? Is this for sure the correct method I should be using? ```python package io.ia.deserializer; import java.io.IOException; import java.nio.file.Files; import java.util.Map; import com.inductiveautomation.ignition.common.xmlserialization.SerializationException; import com.inductiveautomation.ignition.common.xmlserialization.deserialization.DeserializationContext; import com.inductiveautomation.ignition.common.xmlserialization.deserialization.XMLDeserializer; import static java.nio.file.Files.readAllBytes; public final class IgnitionDeserializer { public static void main (String [] args) { if (args.length < 2) { System.err.println("Usage: java IgnitionDeserializer "); System.exit(1); } // Read serialized input byte[] data = null; try { data = Files.readAllBytes(java.nio.file.Path.of(args[0])); } catch (IOException e) { throw new RuntimeException(e); } // Run dumper String output = deserialize(data); // Write to file try { Files.writeString(java.nio.file.Path.of(args[1]), output); } catch (IOException e) { throw new RuntimeException(e); } System.out.println("Deserialized written to " + args[1]); } private static String deserialize(byte [] data){ XMLDeserializer xmlDeserializer = new XMLDeserializer(); DeserializationContext deserializationContext; try { deserializationContext = xmlDeserializer.deserializeBinary(data); } catch (SerializationException e) { throw new RuntimeException(e); } Map deserializedMap = deserializationContext.getRootAttributes(); return deserializedMap.toString(); } } ``` ```python PS C:\Users\akiva\source\repos\ignition-sdk-examples\project-resource> java -jar .\build\libs\project-resource-0.0.1-all.jar "C:\Users\akiva\Downloads\EventScriptBinaries\start_update_shutdown.bin" ./data.out 14:03:43.834 [main] DEBUG Serialization.BinaryParser - Read header, version=2, timestamp=Fri Sep 26 10:00:29 EDT 2025 14:03:43.849 [main] DEBUG Common.BundleUtil - BundleGroupClassLoader#getResource("common.properties") 14:03:43.859 [main] DEBUG Common.BundleUtil - BundleGroupClassLoader#getResource("common_en.properties") 14:03:43.860 [main] DEBUG Common.BundleUtil - BundleGroupClassLoader#getResource("common_en_US.properties") 14:03:43.860 [main] DEBUG Common.BundleUtil - Requested load of resource bundle 'common' for locale 'en_US', received bundle for '' 14:03:43.862 [main] DEBUG Serialization.BinaryParser - Read 32 strings from string-table in 3 ms. Exception in thread "main" java.lang.RuntimeException: com.inductiveautomation.ignition.common.xmlserialization.SerializationException: Unexpected parsing error during binary deserialization. at io.ia.deserializer.IgnitionDeserializer.deserialize(IgnitionDeserializer.java:48) at io.ia.deserializer.IgnitionDeserializer.main(IgnitionDeserializer.java:29) Caused by: com.inductiveautomation.ignition.common.xmlserialization.SerializationException: Unexpected parsing error during binary deserialization. at com.inductiveautomation.ignition.common.xmlserialization.deserialization.XMLDeserializer.deserializeBinary(XMLDeserializer.java:376) at com.inductiveautomation.ignition.common.xmlserialization.deserialization.XMLDeserializer.deserializeBinary(XMLDeserializer.java:355) at io.ia.deserializer.IgnitionDeserializer.deserialize(IgnitionDeserializer.java:46) ... 1 more Caused by: org.apache.commons.io.IOExceptionWithCause: java.lang.ClassNotFoundException: str at com.inductiveautomation.ignition.common.xmlserialization.encoding.Decoders$SignatureDecoder.binaryToObject(Decoders.java:434) at com.inductiveautomation.ignition.common.xmlserialization.encoding.Decoders$SignatureDecoder.binaryToObject(Decoders.java:408) at com.inductiveautomation.ignition.common.xmlserialization.deserialization.BinaryParser.readAttributes(BinaryParser.java:179) at com.inductiveautomation.ignition.common.xmlserialization.deserialization.BinaryParser.readElement(BinaryParser.java:148) at com.inductiveautomation.ignition.common.xmlserialization.deserialization.BinaryParser.readElement(BinaryParser.java:157) at com.inductiveautomation.ignition.common.xmlserialization.deserialization.BinaryParser.readElement(BinaryParser.java:157) at com.inductiveautomation.ignition.common.xmlserialization.deserialization.BinaryParser.parse(BinaryParser.java:51) at com.inductiveautomation.ignition.common.xmlserialization.deserialization.XMLDeserializer.deserializeBinary(XMLDeserializer.java:367) ... 3 more Caused by: java.lang.ClassNotFoundException: str at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:580) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:490) at java.base/java.lang.Class.forName0(Native Method) at java.base/java.lang.Class.forName(Class.java:467) at java.base/java.lang.Class.forName(Class.java:458) at com.inductiveautomation.ignition.common.xmlserialization.ClassNameResolver.classForNameImpl(ClassNameResolver.java:196) at com.inductiveautomation.ignition.common.xmlserialization.ClassNameResolver.classForName(ClassNameResolver.java:169) at com.inductiveautomation.ignition.common.xmlserialization.encoding.Decoders$SignatureDecoder.binaryToObject(Decoders.java:430) ... 10 more ``` ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [September 26, 2025, 8:40pm UTC](https://forum.inductiveautomation.com/t/deserializing-event-scripts-with-kindling/110978/4 "2025-09-26T20:40:43Z")
You'll need to at least call `initDefaults()` on your deserializer instance: > **[XMLDeserializer](https://files.inductiveautomation.com/sdk/javadoc/ignition83/8.3.0/com/inductiveautomation/ignition/common/xmlserialization/deserialization/XMLDeserializer.html#initDefaults())** > > declaration: package: com.inductiveautomation.ignition.common.xmlserialization.deserialization, class: XMLDeserializer ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [September 26, 2025, 11:39pm UTC](https://forum.inductiveautomation.com/t/deserializing-event-scripts-with-kindling/110978/5 "2025-09-26T23:39:12Z")
Feel free to try this PR out: > > > Fixes #312 It's probably not immediately useful to you, but should prove the concept: ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/9/f/9f11f5fa7b1f85224104c495b687613a59cf11f3.png)