# JSON import bug **URL:** \ **Category:** Ignition\ **Tags:** ignition81\ **Created:** [January 22, 2024, 10:55pm UTC](https://forum.inductiveautomation.com/t/json-import-bug/84597 "2024-01-22T22:55:57Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Daniel\_Webb](https://avatars.discourse-cdn.com/v4/letter/d/67e7ee/32.png) [@Daniel\_Webb](https://forum.inductiveautomation.com/u/Daniel_Webb)\ **Post date:** [January 22, 2024, 10:55pm UTC](https://forum.inductiveautomation.com/t/json-import-bug/84597/1 "2024-01-22T22:55:57Z")
Ignition 8.1.28 (b2023060110) Script in button Event Handlers -\> action -\> actionPerformed: ```auto import json json.dumps({'a': 'test'}) ``` Pushing button results in: ```auto 16:51:54.818 [AWT-EventQueue-0] ERROR com.inductiveautomation.ignition.client.util.gui.ErrorUtil - Error executing script for event: actionPerformed
on component: TestButton 1. com.inductiveautomation.ignition.common.script.JythonExecException: Traceback (most recent call last): File "", line 1, in File "C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\json\ __init__.py", line 108, in from .decoder import JSONDecoder File "C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\json\decoder.py", line 24, in NaN, PosInf, NegInf = _floatconstants() File "C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\json\decoder.py", line 18, in _floatconstants _BYTES = '7FF80000000000007FF0000000000000'.decode('hex') File "C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\encodings\ __init__.py", line 142, in search_function raise CodecRegistryError,\ encodings.CodecRegistryError: incompatible codecs in module "encodings.hex_codec" (C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\encodings\hex_codec.py) at org.python.core.PyException.doRaise(PyException.java:211) at org.python.core.Py.makeException(Py.java:1638) at org.python.core.Py.makeException(Py.java:1642) at encodings$py.search_function$3(C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\encodings\ __init__.py:164) at encodings$py.call_function(C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\encodings\ __init__.py) at org.python.core.PyTableCode.call(PyTableCode.java:173) at org.python.core.PyBaseCode.call(PyBaseCode.java:134) at org.python.core.PyFunction. __call__ (PyFunction.java:416) at org.python.core.PyFunction. __call__ (PyFunction.java:411) at org.python.core.codecs$CodecState.lookup(codecs.java:1706) at org.python.core.codecs.lookup(codecs.java:58) at org.python.core.codecs.decode(codecs.java:98) at org.python.core.PyString.decode(PyString.java:4015) at org.python.core.PyString.str_decode(PyString.java:4023) at org.python.core.PyString$str_decode_exposer. __call__ (Unknown Source) at org.python.core.PyObject. __call__ (PyObject.java:461) at org.python.core.PyObject. __call__ (PyObject.java:465) at json.decoder$py._floatconstants$1(C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\json\decoder.py:22) at json.decoder$py.call_function(C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\json\decoder.py) at org.python.core.PyTableCode.call(PyTableCode.java:173) at org.python.core.PyBaseCode.call(PyBaseCode.java:119) at org.python.core.PyFunction. __call__ (PyFunction.java:406) at json.decoder$py.f$0(C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\json\decoder.py:273) at json.decoder$py.call_function(C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\json\decoder.py) at org.python.core.PyTableCode.call(PyTableCode.java:173) at org.python.core.PyCode.call(PyCode.java:18) at org.python.core.imp.createFromCode(imp.java:630) at org.python.core.imp.createFromPyClass(imp.java:312) at org.python.core.imp.createFromPyClass(imp.java:255) at org.python.core.imp.loadFromSource(imp.java:929) at org.python.core.imp.find_module(imp.java:769) at org.python.core.PyModule.findSubModule(PyModule.java:140) at org.python.core.PyModule.impAttr(PyModule.java:107) at org.python.core.imp.import_next(imp.java:1161) at org.python.core.imp.import_module_level(imp.java:1350) at org.python.core.imp.importName(imp.java:1528) at org.python.core.ImportFunction. __call__ ( __builtin__.java:1285) at org.python.core.PyObject. __call__ (PyObject.java:433) at org.python.core. __builtin__. __import__ ( __builtin__.java:1232) at org.python.core.imp.importFromAs(imp.java:1620) at org.python.core.imp.importFrom(imp.java:1595) at json$py.f$0(C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\json\ __init__.py:293) at json$py.call_function(C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\json\ __init__.py) at org.python.core.PyTableCode.call(PyTableCode.java:173) at org.python.core.PyCode.call(PyCode.java:18) at org.python.core.imp.createFromCode(imp.java:630) at org.python.core.imp.createFromPyClass(imp.java:312) at org.python.core.imp.createFromPyClass(imp.java:255) at org.python.core.imp.loadFromSource(imp.java:929) at org.python.core.imp.find_module(imp.java:769) at org.python.core.imp.import_next(imp.java:1158) at org.python.core.imp.import_module_level(imp.java:1350) at org.python.core.imp.importName(imp.java:1528) at org.python.core.ImportFunction. __call__ ( __builtin__.java:1285) at org.python.core.PyObject. __call__ (PyObject.java:433) at org.python.core. __builtin__. __import__ ( __builtin__.java:1232) at org.python.core.imp.importOne(imp.java:1547) at org.python.pycode._pyx27.f$0(:2) at org.python.pycode._pyx27.call_function() at org.python.core.PyTableCode.call(PyTableCode.java:173) at org.python.core.PyCode.call(PyCode.java:18) at org.python.core.Py.runCode(Py.java:1687) at com.inductiveautomation.ignition.common.script.ScriptManager.runCode(ScriptManager.java:803) at com.inductiveautomation.factorypmi.application.binding.action.ActionAdapter.runActions(ActionAdapter.java:207) at com.inductiveautomation.factorypmi.application.binding.action.ActionAdapter.invoke(ActionAdapter.java:300) at com.inductiveautomation.factorypmi.application.binding.action.RelayInvocationHandler.invoke(RelayInvocationHandler.java:57) at com.sun.proxy.$Proxy64.actionPerformed(Unknown Source) at java.desktop/javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at java.desktop/javax.swing.DefaultButtonModel.setPressed(Unknown Source) at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source) at java.desktop/java.awt.Component.processMouseEvent(Unknown Source) at java.desktop/javax.swing.JComponent.processMouseEvent(Unknown Source) at java.desktop/java.awt.Component.processEvent(Unknown Source) at java.desktop/java.awt.Container.processEvent(Unknown Source) at java.desktop/java.awt.Component.dispatchEventImpl(Unknown Source) at java.desktop/java.awt.Container.dispatchEventImpl(Unknown Source) at java.desktop/java.awt.Component.dispatchEvent(Unknown Source) at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.desktop/java.awt.Container.dispatchEventImpl(Unknown Source) at java.desktop/java.awt.Window.dispatchEventImpl(Unknown Source) at java.desktop/java.awt.Component.dispatchEvent(Unknown Source) at java.desktop/java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.desktop/java.awt.EventQueue$4.run(Unknown Source) at java.desktop/java.awt.EventQueue$4.run(Unknown Source) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) at java.desktop/java.awt.EventQueue$5.run(Unknown Source) at java.desktop/java.awt.EventQueue$5.run(Unknown Source) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) at java.desktop/java.awt.EventQueue.dispatchEvent(Unknown Source) at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.desktop/java.awt.EventDispatchThread.run(Unknown Source) Caused by: org.python.core.PyException: encodings.CodecRegistryError: incompatible codecs in module "encodings.hex_codec" (C:\Users\aedmw\.ignition\cache\gwlocalhost_8088\C0\pylib\encodings\hex_codec.py) ... 102 common frames omitted ``` ---
**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:** [January 22, 2024, 11:00pm UTC](https://forum.inductiveautomation.com/t/json-import-bug/84597/2 "2024-01-22T23:00:13Z")
This is fixed in 8.1.36. ---
**Author:** ![Daniel\_Webb](https://avatars.discourse-cdn.com/v4/letter/d/67e7ee/32.png) [@Daniel\_Webb](https://forum.inductiveautomation.com/u/Daniel_Webb)\ **Post date:** [January 23, 2024, 6:11pm UTC](https://forum.inductiveautomation.com/t/json-import-bug/84597/3 "2024-01-23T18:11:25Z")
Is there a simple fix, like a diff of the pylib json files? I don't have administrative control of the Ignition servers I use and it is a lot of effort to upgrade versions because of Large Corporate Inertia. ---
**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:** [January 23, 2024, 6:16pm UTC](https://forum.inductiveautomation.com/t/json-import-bug/84597/4 "2024-01-23T18:16:54Z")
Actually, yes, in this case it's an easy fix - patch your `codecs.py` file in the `pylib` directory on your gateway to make the `Codec` class a "new-style" class. That is, change the file like this: ```diff @@ -89,7 +89,7 @@ def __repr__ (self): return "<%s.%s object for encoding %s at 0x%x>" % (self. __class__. __module__ , self. __class__. __name__ , self.name, id(self)) -class Codec: +class Codec(object): """ Defines the interface for stateless encoders/decoders. ``` Exact line numbers will vary a little bit depending on what version of Ignition your system started out on. Making that change on the gateway's filesystem should automatically disseminate changes to your designers and clients. See [jython 2.7.x: CodecRegistryError during attempt to use 'json' or 'codecs' module · Issue #96 · jython/jython · GitHub](https://github.com/jython/jython/issues/96) for more details. ---
**Author:** ![Daniel\_Webb](https://avatars.discourse-cdn.com/v4/letter/d/67e7ee/32.png) [@Daniel\_Webb](https://forum.inductiveautomation.com/u/Daniel_Webb)\ **Post date:** [January 23, 2024, 8:38pm UTC](https://forum.inductiveautomation.com/t/json-import-bug/84597/5 "2024-01-23T20:38:21Z")
Thanks so much! Worked like a charm.