# GatewayException: Error serializing parameters **URL:** \ **Category:** Ignition\ **Created:** [June 12, 2017, 3:18pm UTC](https://forum.inductiveautomation.com/t/gatewayexception-error-serializing-parameters/14499 "2017-06-12T15:18:08Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![sbrannen](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sbrannen/32/3459_2.png) [@sbrannen](https://forum.inductiveautomation.com/u/sbrannen)\ **Post date:** [June 12, 2017, 3:18pm UTC](https://forum.inductiveautomation.com/t/gatewayexception-error-serializing-parameters/14499/1 "2017-06-12T15:18:08Z")
Greetings… I am having an issue writing a value to an memory tag via script. The error generated is: **GatewayException: Error serializing parameters.** **caused by NotSerializableException: org.python.core.ReflectedArgs** **Ignition v7.9.3 (b2017060210)** **Java: Oracle Corporation 1.8.0\_131** The memory tag is configured as Type: Integer and Read/Write. It will write to the tag if using binding, but chokes on script. The component I am firing this from is a One-Shot button on the actionPerformed handler, and the value being written is the property: Set Value (in this case, the integer 180) The script causing the error: ```auto OSvalue = event.source.setValue if event.source.parent.parent.parent.getComponent('ExecuteGroup').getComponent('Toggle Button 1').componentEnabled: system.tag.write("ASRS/CraneMove/CraneDestPos_Abs", OSvalue) else: system.tag.write("ASRS/CraneMove/CraneStartPos_Abs", OSvalue) ``` Documentation says that the ‘value’ argument for system.tag.write is of type Int, so I’m a little confused why this will not write to the tag. The path to component and tag were generated using the browse method, so they are correct. I would appreciate any assistance. I hope it is common problem with an easy fix. Kind regards, Steve ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [June 12, 2017, 3:26pm UTC](https://forum.inductiveautomation.com/t/gatewayexception-error-serializing-parameters/14499/2 "2017-06-12T15:26:40Z")
Have you printed/checked the value of `OSValue`? This line: `OSvalue = event.source.setValue` looks suspect to me. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [June 12, 2017, 3:33pm UTC](https://forum.inductiveautomation.com/t/gatewayexception-error-serializing-parameters/14499/3 "2017-06-12T15:33:40Z")
Yeah, so the one-shot button actually has a method on it named `setValue` which is what you’re getting when you try to reference the property. Try this instead: `OSValue = event.source.getSetValue()` Just an unfortunate naming clash here. ---
**Author:** ![sbrannen](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sbrannen/32/3459_2.png) [@sbrannen](https://forum.inductiveautomation.com/u/sbrannen)\ **Post date:** [June 12, 2017, 4:06pm UTC](https://forum.inductiveautomation.com/t/gatewayexception-error-serializing-parameters/14499/4 "2017-06-12T16:06:26Z")
Kevin, thank you! That worked great. Is the ‘getxx()’ nomenclature the normal syntax for revealing values? I have to say though, that is less than user friendly - especially when using the ‘browse’ icon to drill down to the Set Value property - one would think a variable would be set to the value within the method and not the Method descriptor. Cheers, Steve ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [June 12, 2017, 4:17pm UTC](https://forum.inductiveautomation.com/t/gatewayexception-error-serializing-parameters/14499/5 "2017-06-12T16:17:18Z")
Everything is getXxYy() and setXxYy() “under the hood” but are also given the Python-friendly property accessors that you’re accustomed to using. Like I said, this is an unfortunate naming clash where the property called ‘Set Value’ or ‘setValue’ clashes with a method name on the button. ---
**Author:** ![sbrannen](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sbrannen/32/3459_2.png) [@sbrannen](https://forum.inductiveautomation.com/u/sbrannen)\ **Post date:** [June 12, 2017, 4:47pm UTC](https://forum.inductiveautomation.com/t/gatewayexception-error-serializing-parameters/14499/6 "2017-06-12T16:47:56Z")
Thank you. Good info. I could find no info in the manual regarding this syntax. Your results may vary. ---
**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:** [March 7, 2025, 3:34pm UTC](https://forum.inductiveautomation.com/t/gatewayexception-error-serializing-parameters/14499/7 "2025-03-07T15:34:13Z")
Split this topic on March 7, 2025, 3:34pm UTC 3 posts were split to a new topic: [Error serializing parameters from propertyChange script](https://forum.inductiveautomation.com/t/error-serializing-parameters-from-propertychange-script/103385)