# Unable to build modules from the example repo **URL:** \ **Category:** Module Development\ **Created:** [April 30, 2019, 3:13pm UTC](https://forum.inductiveautomation.com/t/unable-to-build-modules-from-the-example-repo/24513 "2019-04-30T15:13:13Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![code\_skin](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@code\_skin](https://forum.inductiveautomation.com/u/code_skin)\ **Post date:** [April 30, 2019, 3:13pm UTC](https://forum.inductiveautomation.com/t/unable-to-build-modules-from-the-example-repo/24513/1 "2019-04-30T15:13:13Z")
version: 7.9.10 os: win 7 pro ide: intelliJ Hey everyone, I'm new to these territories of Ignition and I'm following: [https://docs.inductiveautomation.com/display/SE/Environment+Setup](https://docs.inductiveautomation.com/display/SE/Environment+Setup) I'm using chocolatey as my package manager. I successfully cloned the example repo: `git clone https://github.com/inductiveautomation/ignition-sdk-examples.git` I launched the IDE via pom.xml it looks like all dependencies are downloaded and cached. Then when I run `mvn package` from git or cmd I get an error about class 55.0 should be 52.0 error: > ``` > 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. > > ``` Additional notes with regards to [Environment Setup - Ignition SDK Programmer's Guide - Ignition Documentation](https://docs.inductiveautomation.com/display/SE/Environment+Setup) Step 1: "You will need Java JDK 1.8+..." Is this required because when I used chocolatey to install maven it forced me to download jdk 18.0\_211? Step 3: "you will want a running version of Ignition..." This step doesn't specify what version, but the git repo's readme.md states "A running, 8.0+ version of Ignition" as a requirement. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [April 30, 2019, 3:14pm UTC](https://forum.inductiveautomation.com/t/unable-to-build-modules-from-the-example-repo/24513/2 "2019-04-30T15:14:32Z")
The docs are a bit out of date, you need JDK 11, which is what that error is about. ---
**Author:** ![code\_skin](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@code\_skin](https://forum.inductiveautomation.com/u/code_skin)\ **Post date:** [April 30, 2019, 3:33pm UTC](https://forum.inductiveautomation.com/t/unable-to-build-modules-from-the-example-repo/24513/3 "2019-04-30T15:33:44Z")
@Kevin.Herron thank you! To anyone else experiencing the same issue; after installing jdk 11 you’ll need to update your JAVA\_HOME environment variables and point to the jdk11 install directory. I restarted git/bash and was able to the build the module. ---
**Author:** ![code\_skin](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@code\_skin](https://forum.inductiveautomation.com/u/code_skin)\ **Post date:** [April 30, 2019, 6:22pm UTC](https://forum.inductiveautomation.com/t/unable-to-build-modules-from-the-example-repo/24513/4 "2019-04-30T18:22:35Z")
While that fixed the build of the expression sample. I'm getting a different error when building the scripting example (which is the one I'm really after). > [INFO] ------------------------------------------------------------- > [ERROR] COMPILATION ERROR : > [INFO] ------------------------------------------------------------- > [ERROR] /Z:/SHARED/ignitionDev/ignition-sdk-examples/scripting-function/scripting-function-gateway/src/main/java/com/inductiveautomation/ignition/examples/scripting/GatewayHook.java:[43,5] method does not override or implement a method from a supertype > [INFO] 1 error > [INFO] ------------------------------------------------------------- > [INFO] ------------------------------------------------------------------------ > [INFO] Reactor Summary for scripting-function 1.0.0-SNAPSHOT: > [INFO] > [INFO] scripting-function ................................. SUCCESS [0.127 s] > [INFO] scripting-function-common .......................... SUCCESS [01:19 min] > [INFO] scripting-function-client .......................... SUCCESS [18.879 s] > [INFO] scripting-function-designer ........................ SUCCESS [8.095 s] > [INFO] scripting-function-gateway ......................... FAILURE [28.707 s] > [INFO] scripting-function-build ........................... SKIPPED > [INFO] ------------------------------------------------------------------------ > [INFO] BUILD FAILURE > [INFO] ------------------------------------------------------------------------ > [INFO] Total time: 02:20 min > [INFO] Finished at: 2019-04-30T13:14:50-05:00 > [INFO] ------------------------------------------------------------------------ > [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.2:compile (default-compile) on project scripting-function-gateway: Compilation failure > [ERROR] /Z:/SHARED/ignitionDev/ignition-sdk-examples/scripting-function/scripting-function-gateway/src/main/java/com/inductiveautomation/ignition/examples/scripting/GatewayHook.java:[43,5] method does not override or implement a method from a supertype ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [April 30, 2019, 7:04pm UTC](https://forum.inductiveautomation.com/t/unable-to-build-modules-from-the-example-repo/24513/5 "2019-04-30T19:04:00Z")
This one isn’t your fault, the scripting example needed to be updated. I just pushed the fix and it should compile now once you pull the changes in. ---
**Author:** ![code\_skin](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@code\_skin](https://forum.inductiveautomation.com/u/code_skin)\ **Post date:** [April 30, 2019, 7:06pm UTC](https://forum.inductiveautomation.com/t/unable-to-build-modules-from-the-example-repo/24513/6 "2019-04-30T19:06:53Z")
I'm just cowboy'ing over here and decided to delete: > @Override > public Object getRPCHandler(......) I got the module to build, but then noticed the method did not work (no RPC handler lol) @Kevin.Herron, pulled the changes and it built. Thanks! ---
**Author:** ![code\_skin](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@code\_skin](https://forum.inductiveautomation.com/u/code_skin)\ **Post date:** [April 30, 2019, 7:43pm UTC](https://forum.inductiveautomation.com/t/unable-to-build-modules-from-the-example-repo/24513/7 "2019-04-30T19:43:13Z")
How do I build this module for a 7.9.10 install? I tried modifying the parent pom.xml from: `8.0.0` to: `7.9.10` > [ERROR] Failed to execute goal on project scripting-function-gateway: Could not resolve dependencies for project com.inductiveautomation.ignition.examples:scripting-function-gateway:jar:1.0.0-SNAPSHOT: Could not find artifact org.eclipse.milo:sdk-client:jar:0.1.0-SNAPSHOT in snapshots ([https://nexus.inductiveautomation.com/repository/inductiveautomation-snapshots](https://nexus.inductiveautomation.com/repository/inductiveautomation-snapshots)) I also tried using 7.9.0 with the same results. My thought behind that was if I can import modules to a 8.0.1-rc1 gateway using 8.0.0 as the ignition-platform-version then 7.9.0 would work with all 7.9.\* Unfortunately, that wasn't the case. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [April 30, 2019, 7:49pm UTC](https://forum.inductiveautomation.com/t/unable-to-build-modules-from-the-example-repo/24513/8 "2019-04-30T19:49:23Z")
There’s a branch in that repo called `ignition-7.9` that has the 7.9 version of the examples: [https://github.com/inductiveautomation/ignition-sdk-examples/tree/ignition-7.9](https://github.com/inductiveautomation/ignition-sdk-examples/tree/ignition-7.9) Changing the SDK version is not enough, some examples don’t even exist and others have been changed quite a bit. ---
**Author:** ![code\_skin](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@code\_skin](https://forum.inductiveautomation.com/u/code_skin)\ **Post date:** [April 30, 2019, 8:15pm UTC](https://forum.inductiveautomation.com/t/unable-to-build-modules-from-the-example-repo/24513/9 "2019-04-30T20:15:54Z")
Thanks @Kevin.Herron. I was able to build the 7.9 scripting example using the correct branch.