B4J Question ABMaterial Template project not working

[fikayo]

I just got ABMaterial yesterday and followed the installation instructions and then usage as per the ABM Template project for Dummies. However, when trying to compile/run, I first got this error from the ABMApplication page:

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Error description: Unknown member: enablepassiveeventlisteners
Error occurred on line: 32
ABM.EnablePassiveEventListeners=False
Word: enablepassiveeventlisteners
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So, I commented out the line 32 and tried again.
Then got this error:

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Compiling generated Java code. Error
javac 1.8.0_271
src\com\ab\template\abmapplication.java:37: error: cannot access WebSocket
public anywheresoftware.b4j.object.WebSocket _ws = null;
^
bad class file: C:\Program Files\Anywhere Software\B4J\libraries\jserver.jar(anywheresoftware/b4j/object/WebSocket.class)
class file has wrong version 55.0, should be 52.0
Please remove or make sure it appears in the correct subdirectory of the classpath.
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Please enlighten me on what I might have done wrong and the way forward.

 

[MichalK73]

What Java library are you using?
What modules do you have included in the project?

 

[alwaysbusy]

So, I commented out the line 32 and tried again.

that is correct. it is depreciated.

jServer 4.00 requires Java 11+ (you use v 8): see https://www.b4x.com/android/forum/threads/jserver-v4-0-based-on-jetty-11.140437/#content

 

[fikayo]

that is correct. it is depreciated.

jServer 4.00 requires Java 11+ (you use v 8): see https://www.b4x.com/android/forum/threads/jserver-v4-0-based-on-jetty-11.140437/#content

Thank you. I changed to Java 11 and it now works!
Will continue to familiarize with the product and ask for help if there are other issues.

 

[fikayo]

What Java library are you using?
What modules do you have included in the project?

I was actually using Java 8 but just changed it to Java 11 and it now works! Thanks a lot.