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I have seen many answers in these forum, but none related to GX so far, and the ones I've tried haven't solved this issue.

When trying to deploy a GX 15 + JAVA + Web + Mobile I get the following error:

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java.lang.IllegalArgumentException: Class file is Java 8 but max supported is Java 7: C:\modelos\pruebagoogle\Deploy\JavaModel\GAE\20170422042109\WEB-INF\classes\com\proyecto02\gamcheckuseractivationmethod.class
Unable to update app: Class file is Java 8 but max supported is Java 7: C:\modelos\pruebagoogle\Deploy\JavaModel\GAE\20170422042109\WEB-INF\classes\com\proyecto02\gamcheckuseractivationmethod.class

error: C:\GeneXus\GeneXus15\DeploymentTargets\GoogleAppEngine\deploy.msbuild(4,3): error MSB3073: The command ""C:\android\engine\appengine-java-sdk-1.9.51\bin\appcfg.cmd" -A proyecto02 update "C:\modelos\pruebagoogle\Deploy\JavaModel\GAE\20170422042109" -V 3" exited with code 1.
Done Building Project "C:\GeneXus\GeneXus15\DeploymentTargets\GoogleAppEngine\deploy.msbuild" (Deploy target(s)) -- FAILED.
...

To build mobile apps GX 15 requires JDK 8.

Has anyone been able to deploy to Google Cloud?
Any suggestions to solve the error?

Martin Evans
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Bernardo López
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1 Answers1

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GeneXus Java generator does not require Java 8, it requires Java 6 or higher, Genexus Android generator requires Java 8.

Each generator has independent properties to set the JDK to be used, compiler options, etc. So, no matter you are using JDK 8 you are able to set "Java compiler options" (for Java Generator) as: -O -source 1.7 -target 1.7 in order to compile the application to run on 1.7 JVM (as explained here)

Another solution is to have both JDKs installed, to set JDK 1.7 path as Java Generator/Compiler path and JDK 1.8 path as Android/Compiler Path.

Community
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Guscarr
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  • Greetings Gustavo! Thanks again for the answer. I finished a Rebuild All and tried with both JDKs installed and setting each separately for Java and Android, and it didn't work. The other way, setting the options **-O -source 1.7 -target 1.7** in the **Build Process - Advanced - Compiler Options** and doing another Rebuild All didn't work neither. I will have to check all the rest of the configurations, something else must be missing. – Bernardo López Apr 30 '17 at 22:56
  • I still get no way out of the same error. I am working with **jdk1.7.0_80** and **jdk1.8.0_131**, which versions are you working with? By the way, my app has GAM. – Bernardo López May 14 '17 at 15:53