Error while installing Toolbox (java.lang​.NoClassDe​fFoundErro​r)

I am trying to install a trial of the Image Acquisition Toolbox, but keep getting an error on ~90%. Apparently it has something to do with org.apache.lucene.analysis.core.SimpleAnalyzer (see below for message from log file).

Even though it fails, it shows on 'ver', but 'imaqtool' freezes and gives an error (see below).

Any help would be much appreciated. Thanks

%% Excerpt from log file

(May 20, 2020 16:46:29) Task MATLAB R2019b Startup Accelerator for E:\Program Files\MATLAB\bin\win64\MATLABStartupAccelerator.exe exists
(May 20, 2020 16:46:29) Stopping task MATLAB R2019b Startup Accelerator
(May 20, 2020 16:46:29) Download thread pool size = 4
(May 20, 2020 16:46:29) Installing Product: Image Acquisition Toolbox
(May 20, 2020 16:46:34) java.lang.NoClassDefFoundError: org/apache/lucene/analysis/core/SimpleAnalyzer
	at com.mathworks.install.command.doc.BuildSharedDocController.getSubCommands(BuildSharedDocController.java:51)
	at com.mathworks.install.command.doc.BuildSharedDocController.execute(BuildSharedDocController.java:37)
	at com.mathworks.install.command.doc.BuildSharedDocCommand.execute(BuildSharedDocCommand.java:50)
	at com.mathworks.install_impl.InstallModule$1.installProducts(Unknown Source)
	at com.mathworks.install_impl.InstallerImpl.install(Unknown Source)
	at com.mathworks.installwizard.model.InstallTask.execute(InstallTask.java:46)
	at com.mathworks.installwizard.model.AbstractBackgroundTask.execute(AbstractBackgroundTask.java:38)
	at com.mathworks.install_task.AbstractInstallTask.call(AbstractInstallTask.java:50)
	at com.mathworks.install_task.AbstractInstallTask.call(AbstractInstallTask.java:18)
	at com.mathworks.wizard.worker.WorkerImpl.doInBackground(WorkerImpl.java:24)
	at javax.swing.SwingWorker$1.call(SwingWorker.java:295)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at javax.swing.SwingWorker.run(SwingWorker.java:334)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: org.apache.lucene.analysis.core.SimpleAnalyzer
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
 
 %% Error shown after executing 'imaqtool'

Error using iatbrowser.ROIGUIElementsController (line 47)
Invalid default value for property 'HImrect' in class 'iatbrowser.ROIRect':
imrect requires a Image_Toolbox license.

Error in iatbrowser.Browser/initialize

Error in iatbrowser.Browser

Error in imaqtool (line 24)
browser = iatbrowser.Browser;

%% Output from 'ver'

-----------------------------------------------------------------------------------------------------
MATLAB Version: 9.7.0.1190202 (R2019b)
MATLAB License Number: 40839756
Operating System: Microsoft Windows 7 Professional  Version 6.1 (Build 7601: Service Pack 1)
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
-----------------------------------------------------------------------------------------------------
MATLAB                                                Version 9.7         (R2019b)
Deep Learning Toolbox                                 Version 13.0        (R2019b)
Image Acquisition Toolbox                             Version 6.1         (R2019b)
Image Processing Toolbox                              Version 11.0        (R2019b)
MATLAB Compiler                                       Version 7.1         (R2019b)
Parallel Computing Toolbox                            Version 7.1         (R2019b)
Signal Processing Toolbox                             Version 8.3         (R2019b)
Statistics and Machine Learning Toolbox               Version 11.6        (R2019b)

[Walter Roberson]

Is it possible that you have configured Java related environment variables in your system? JAVA_HOME and CLASSPATH in particular? You might have those if you had previously forced MATLAB to use a different Java version. https://www.mathworks.com/help/compiler_sdk/java/configure-your-java-environment.html

https://stackoverflow.com/questions/19632875/creating-new-lucene-index-no-class-found-error

[Guillermo Vicente]

Yes, I had to tamper with Java to use WSDL (I installed OpenJDK). How can I reset it to "default" values? Thank you.

[Walter Roberson]

https://www.java.com/en/download/help/path.xml but you would be looking for JAVA_HOME and CLASSPATH

Answer 1

[Guillermo Vicente]

I have finally been able to run the toolbox installation without problems. This is what I did.

1. Downloaded lucene version 4.6.1 from https://archive.apache.org/dist/lucene/java/4.6.1/
2. In the Image Acquisition Toolbox folder (after downloading and decompressing it), one can find the folder /java/jarext
3. In that folder there are 8 files called lucene-*****.jar, which I replaced with the files found in 4.6.1

I still haven't thoroughly tested everything, but at least the install was smooth. I'll post if there's any other problem. Thanks for your help, Walter.