URock and Java version

[Valrsd]

Hello everyone,

I am a student and I want to calculate the PET for a school playground.

I have downloaded the last version of Java (jre-8u441) but when I run URock on my dataset I receive this message :

Writing settings for this model run to specified output folder (Filename: RunInfoURock_YYYY_DOY_HHMM.txt)
Initiating algorithm
Creates an H2GIS Instance and load data
Traceback (most recent call last):
File "org.jpype.manager.TypeManager.java", line 0, in org.jpype.manager.TypeManager.findClassByName
Exception: Java Exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Users/valen/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\processing_umep\processor\urock_processing_algorithm.py", line 447, in processAlgorithm
MainCalculation.main(javaEnvironmentPath = javaEnvVar,
File "C:\Users/valen/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\processing_umep\functions\URock\MainCalculation.py", line 134, in main
H2gisConnection.startH2gisInstance(dbDirectory = dBDir,
File "C:\Users/valen/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\processing_umep\functions\URock\H2gisConnection.py", line 144, in startH2gisInstance
conn = jaydebeapi.connect( "org.h2.Driver",
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\valen\AppData\Roaming\Python\Python312\site-packages\jaydebeapi_init_.py", line 412, in connect
jconn = jdbc_connect(jclassname, url, driver_args, jars, libs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\valen\AppData\Roaming\Python\Python312\site-packages\jaydebeapi_init.py", line 221, in _jdbc_connect_jpype
jpype.JClass(jclassname)
File "C:\Users\valen\AppData\Roaming\Python\Python312\site-packages\jpype_jclass.py", line 99, in new
return _jpype._getClass(jc)
^^^^^^^^^^^^^^^^^^^^
java.lang.java.lang.UnsupportedClassVersionError: java.lang.UnsupportedClassVersionError: org/h2/Driver has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0

Thank you in advance for your answers
Valentin

[j3r3m1]

Hi.
It seems you are using a too old version of Java (version 8) while you should use a version 11 or higher. See https://umep-docs.readthedocs.io/en/latest/Getting_Started.html#installing-the-umep-plugin for more detail

[Valrsd]

Hello Jeremy,

Thank you for your answer.

[j3r3m1]

You are welcome ! Please consider mark the discussion as answered if it solved your error !