error while importing oscP5

[joachimheintz]

i have oscP5 installed, and it works in java code.
but for any simple code in processing.py, for instance ...

add_library('oscP5')
def setup():
size(400,400)

... i get this error:
java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')
at jycessing.LibraryImporter.addJarToClassLoader(LibraryImporter.java:315)
at jycessing.LibraryImporter.recursivelyAddJarsToClasspath(LibraryImporter.java:164)
at jycessing.LibraryImporter.addLibrary(LibraryImporter.java:140)
at jycessing.LibraryImporter$1.call(LibraryImporter.java:82)
at org.python.core.PyObject.call(PyObject.java:480)
at org.python.core.PyObject.call(PyObject.java:484)
at org.python.pycode._pyx54.f$0(oscP5_python.pyde:1)
at org.python.pycode._pyx54.call_function(oscP5_python.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.pycode._pyx53.f$0(/home/jh/sketchbook/oscP5_python/oscP5_python.pyde:96)
at org.python.pycode._pyx53.call_function(/home/jh/sketchbook/oscP5_python/oscP5_python.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:233)
at jycessing.PAppletJythonDriver.findSketchMethods(PAppletJythonDriver.java:613)
at jycessing.Runner.runSketchBlocking(Runner.java:399)
at jycessing.mode.run.SketchRunner.lambda$2(SketchRunner.java:112)
at java.base/java.lang.Thread.run(Thread.java:833)

[joachimheintz]

i should add:
Processing 4.0.1
Debian Linux 11

[baltner]

I am seeing the same thing with add_library('pdf'). Question: Is the java runtime used by Processing 4.0.1 included in the download or is it assumed that the host machine already has a jre installed? I do not have one on my Macbook Pro (12.6.1).

[ThomasNLy]

I got the same error when trying to use the sound library too

[tabreturn]

Processing JRE is bundled with Processing. Try Processing 3.5.4 instead.

[colpiche]

I got the same error when trying to use the sound library too

Definitely the same error, with sound library too