# Exported application crashes -- illegal reflective access operation error

**URL:** <https://discourse.processing.org/t/exported-application-crashes-illegal-reflective-access-operation-error/16029>\
**Category:** Processing.py\
**Created:** [December 2, 2019, 2:57am UTC](https://discourse.processing.org/t/exported-application-crashes-illegal-reflective-access-operation-error/16029 "2019-12-02T02:57:04Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![sargent](https://avatars.discourse-cdn.com/v4/letter/s/c67d28/32.png) [@sargent](https://discourse.processing.org/u/sargent)\
**Post date:** [December 2, 2019, 2:57am UTC](https://discourse.processing.org/t/exported-application-crashes-illegal-reflective-access-operation-error/16029/1 "2019-12-02T02:57:04Z")

</div>

I have a processing.py sketch that runs fine in the IDE but when I export it (I’m running a mac), I get the following error:

```auto
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.python.core.PyJavaType (file:/Users/basic/Documents/your_story1/your_story7/application.macosx/your_story7.app/Contents/Processing/lib/jycessing/jython.jar) to method java.lang.Object.finalize()
WARNING: Please consider reporting this to the maintainers of org.python.core.PyJavaType
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
java.lang.reflect.InaccessibleObjectException: Unable to make private java.lang.constant.ConstantDesc java.lang.constant.DynamicConstantDesc.tryCanonicalize() accessible: module java.base does not "opens java.lang.constant" to unnamed module @378542de
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:344)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:284)
	at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:198)
	at java.base/java.lang.reflect.Method.setAccessible(Method.java:192)
	at org.python.core.PyJavaType.init(PyJavaType.java:298)
	at org.python.core.PyType.createType(PyType.java:1523)
	at org.python.core.PyType.addFromClass(PyType.java:1462)
	at org.python.core.PyType.fromClassSkippingInners(PyType.java:1585)
	at org.python.core.PyJavaType.init(PyJavaType.java:270)
	at org.python.core.PyType.createType(PyType.java:1523)
	at org.python.core.PyType.addFromClass(PyType.java:1462)
	at org.python.core.PyType.fromClass(PyType.java:1551)
	at org.python.core.PyType.fromClass(PyType.java:1569)
	at org.python.core.PyType.fromClass(PyType.java:1569)
	at org.python.core.PyJavaType.wrapJavaObject(PyJavaType.java:90)
	at org.python.core.adapter.ClassicPyObjectAdapter.adapt(ClassicPyObjectAdapter.java:135)
	at org.python.core.Py.java2py(Py.java:2017)
	at org.python.core.PyReflectedField._doget(PyReflectedField.java:42)
	at org.python.core.PyObject._doget(PyObject.java:1173)
	at org.python.core.PyObject. __get__ (PyObject.java:3816)
	at org.python.core.PyType.type ___findattr_ex__ (PyType.java:1620)
	at org.python.core.PyType. __findattr_ex__ (PyType.java:1599)
	at org.python.core.PyObject. __findattr__ (PyObject.java:965)
	at org.python.core.PyObject. __findattr__ (PyObject.java:950)
	at org.python.core.imp.ensureFromList(imp.java:1016)
	at org.python.core.imp.ensureFromList(imp.java:1012)
	at org.python.core.imp.ensureFromList(imp.java:990)
	at org.python.core.imp.import_module_level(imp.java:977)
	at org.python.core.imp.importName(imp.java:1057)
	at org.python.core.ImportFunction. __call__ ( __builtin__.java:1280)
	at org.python.core.PyObject. __call__ (PyObject.java:450)
	at org.python.core. __builtin__. __import__ ( __builtin__.java:1232)
	at org.python.core.imp.importAll(imp.java:1176)
	at os$py.f$0(os.py:726)
	at os$py.call_function(os.py)
	at org.python.core.PyTableCode.call(PyTableCode.java:171)
	at org.python.core.PyCode.call(PyCode.java:18)
	at org.python.core.imp.createFromCode(imp.java:436)
	at org.python.core.util.importer.importer_load_module(importer.java:116)
	at org.python.modules.zipimport.zipimporter.zipimporter_load_module(zipimporter.java:170)
	at org.python.modules.zipimport.zipimporter$zipimporter_load_module_exposer. __call__ (Unknown Source)
	at org.python.core.PyBuiltinMethodNarrow. __call__ (PyBuiltinMethodNarrow.java:46)
	at org.python.core.imp.loadFromLoader(imp.java:593)
	at org.python.core.imp.find_module(imp.java:547)
	at org.python.core.imp.import_next(imp.java:838)
	at org.python.core.imp.import_module_level(imp.java:957)
	at org.python.core.imp.importName(imp.java:1057)
	at org.python.core.ImportFunction. __call__ ( __builtin__.java:1280)
	at org.python.core.PyObject. __call__ (PyObject.java:450)
	at org.python.core. __builtin__. __import__ ( __builtin__.java:1232)
	at org.python.core.imp.importOne(imp.java:1076)
	at linecache$py.f$0(linecache.py:68)
	at linecache$py.call_function(linecache.py)
	at org.python.core.PyTableCode.call(PyTableCode.java:171)
	at org.python.core.PyCode.call(PyCode.java:18)
	at org.python.core.imp.createFromCode(imp.java:436)
	at org.python.core.util.importer.importer_load_module(importer.java:116)
	at org.python.modules.zipimport.zipimporter.zipimporter_load_module(zipimporter.java:170)
	at org.python.modules.zipimport.zipimporter$zipimporter_load_module_exposer. __call__ (Unknown Source)
	at org.python.core.PyBuiltinMethodNarrow. __call__ (PyBuiltinMethodNarrow.java:46)
	at org.python.core.imp.loadFromLoader(imp.java:593)
	at org.python.core.imp.find_module(imp.java:547)
	at org.python.core.imp.import_next(imp.java:838)
	at org.python.core.imp.import_module_level(imp.java:957)
	at org.python.core.imp.importName(imp.java:1057)
	at org.python.core.ImportFunction. __call__ ( __builtin__.java:1280)
	at org.python.core.PyObject. __call__ (PyObject.java:450)
	at org.python.core. __builtin__. __import__ ( __builtin__.java:1232)
	at org.python.core.imp.importOne(imp.java:1076)
	at warnings$py.f$0(/Users/basic/Documents/your_story1/your_story7/application.macosx/your_story7.app/Contents/Processing/lib/jycessing/jython.jar/Lib/warnings.py:424)
	at warnings$py.call_function(/Users/basic/Documents/your_story1/your_story7/application.macosx/your_story7.app/Contents/Processing/lib/jycessing/jython.jar/Lib/warnings.py)
	at org.python.core.PyTableCode.call(PyTableCode.java:171)
	at org.python.core.PyCode.call(PyCode.java:18)
	at org.python.core.imp.createFromCode(imp.java:436)
	at org.python.core.util.importer.importer_load_module(importer.java:116)
	at org.python.modules.zipimport.zipimporter.zipimporter_load_module(zipimporter.java:170)
	at org.python.modules.zipimport.zipimporter$zipimporter_load_module_exposer. __call__ (Unknown Source)
	at org.python.core.PyBuiltinMethodNarrow. __call__ (PyBuiltinMethodNarrow.java:46)
	at org.python.core.imp.loadFromLoader(imp.java:593)
	at org.python.core.imp.find_module(imp.java:547)
	at org.python.core.imp.import_next(imp.java:838)
	at org.python.core.imp.import_module_level(imp.java:957)
	at org.python.core.imp.importName(imp.java:1057)
	at org.python.core.ImportFunction. __call__ ( __builtin__.java:1280)
	at org.python.core.PyObject. __call__ (PyObject.java:450)
	at org.python.core. __builtin__. __import__ ( __builtin__.java:1232)
	at org.python.core. __builtin__. __import__ ( __builtin__.java:1192)
	at org.python.core.Py.importWarnings(Py.java:479)
	at org.python.core.Py.warning(Py.java:504)
	at org.python.core.Py.warning(Py.java:499)
	at org.python.core.imp.loadFromSource(imp.java:628)
	at org.python.core.imp.find_module(imp.java:551)
	at org.python.core.imp.import_next(imp.java:838)
	at org.python.core.imp.import_module_level(imp.java:957)
	at org.python.core.imp.importName(imp.java:1057)
	at org.python.core.ImportFunction. __call__ ( __builtin__.java:1280)
	at org.python.core.PyObject. __call__ (PyObject.java:450)
	at org.python.core. __builtin__. __import__ ( __builtin__.java:1232)
	at org.python.core.imp.importFromAs(imp.java:1149)
	at org.python.core.imp.importFrom(imp.java:1124)
	at org.python.pycode._pyx2.f$0(/Users/basic/Documents/your_story1/your_story7/application.macosx/your_story7.app/Contents/Processing/source/your_story7.pyde:91)
	at org.python.pycode._pyx2.call_function(/Users/basic/Documents/your_story1/your_story7/application.macosx/your_story7.app/Contents/Processing/source/your_story7.pyde)
	at org.python.core.PyTableCode.call(PyTableCode.java:171)
	at org.python.core.PyCode.call(PyCode.java:18)
	at org.python.core.Py.runCode(Py.java:1614)
	at org.python.core.Py.exec(Py.java:1658)
	at org.python.util.PythonInterpreter.exec(PythonInterpreter.java:276)
	at jycessing.PAppletJythonDriver.processSketch(PAppletJythonDriver.java:230)
	at jycessing.PAppletJythonDriver.<init>(PAppletJythonDriver.java:409)
	at jycessing.Runner.runSketchBlocking(Runner.java:386)
	at jycessing.Runner.runSketchBlocking(Runner.java:280)
	at jycessing.Runner.main(Runner.java:185)

```

here is a link to the sketch and the application.

> **[your\_story7.zip](https://wetransfer.com/downloads/cd0cf73197e0510c47556182c17598ce20191202024822/e3b050)**
>
> 1 file sent via WeTransfer, the simplest way to send your files around the world

---

<div class="post-metadata">

**Author:** ![kll](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/kll/32/964_2.png) [@kll](https://discourse.processing.org/u/kll)\
**Post date:** [December 2, 2019, 3:18am UTC](https://discourse.processing.org/t/exported-application-crashes-illegal-reflective-access-operation-error/16029/2 "2019-12-02T03:18:04Z")

</div>

may i ask if you already exported any example sketch  
and that worked well?

and what export options did you click?

* * *

if you have a problem with some code  
and you want to share it,  
please spend some time and cut it down to the problem  
means make a MVCE  
and not send us a 500MB download  
with all this pictures ( where one might be enough for a test )  
and all that code making this flickering screen what not fits on my monitor

possibly even that process,  
cutting your project down to the line what causes the problem  
helps you already to find or narrow down the error.