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FredDL1-Visitor
1-Visitor
April 14, 2022
Solved

Extension Class has been compiled by a more recent version of the Java Runtime

  • April 14, 2022
  • 1 reply
  • 3996 views

Hello,

 

 

I am trying to make my first extension in ThingWorx 8.5. Everything seems fine but when I try to import it I have the following error:

zip4jExplorer/ZipExplorerThingTemplate has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 52.0

Here are my settings for the Java compiler: 

FredDL_0-1649926426947.png

I use JavaSE-1.8 which correspond to JavaRuntime 52.0 according to the documentation

I use gradle to build the extension.

Any Idea about what I am doing wrong? 
Best regards

    Best answer by FredDL

    So I figure it out. My problem was the jdk used by gradle, which was the default jdk used by eclipse (jdk 11) 

    To change the gradle  jdk set up in Eclipse  go to Window/preference/gradle

    FredDL_0-1650554227765.png

     there you can change the java home used by gradle.

     

    Best regards

     

    1 reply

    V
    24-Ruby III
    VladimirN24-Ruby III
    24-Ruby III
    April 14, 2022

     Hi,

     

    Read the following articles:

    F
    FredDL1-VisitorAuthor
    1-Visitor
    April 14, 2022

    Hi Vladimir, 

     

    thanks for your reply but the linked articles recommends to change MS-SQL driver/JDBC version. Those are not used in my thingworx extension.

    The only external library is zip4j .

    The error refers to the ThingTemplate Class which is reported as compiled with the non compatible 61.0 version although the java compiler compliance in Eclipse is set to 1.8 (52.0)

    FredDL_0-1649938651794.png

    This seems strange to me and i have no clue how to fix it.

     

     

      F
      FredDL1-VisitorAuthorAnswer
      1-Visitor
      April 21, 2022

      So I figure it out. My problem was the jdk used by gradle, which was the default jdk used by eclipse (jdk 11) 

      To change the gradle  jdk set up in Eclipse  go to Window/preference/gradle

      FredDL_0-1650554227765.png

       there you can change the java home used by gradle.

       

      Best regards

       

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