D dieterp Active Member Licensed User Longtime User Jul 21, 2023 #1 I'm running into incompatible version issues when I try run m B4J app (Built on my local laptop) on my Windows Server. The exact error is "App has been compiled by a more recent version of the java runtime <Class file version 53.0>, this version of the java runtime only recognizes class file versions up to 52.0" I am using the latest version OpenJDK 14 from the B4x website on my local laptop. As I understand it version 52.0 = Java 8 and version 53.0 = Java 9. My questions are: 1) Why would my app compile in java 9 if I'm using a later version of Java 2) How can I go about getting the app to be compatible with the Java version running on my server
I'm running into incompatible version issues when I try run m B4J app (Built on my local laptop) on my Windows Server. The exact error is "App has been compiled by a more recent version of the java runtime <Class file version 53.0>, this version of the java runtime only recognizes class file versions up to 52.0" I am using the latest version OpenJDK 14 from the B4x website on my local laptop. As I understand it version 52.0 = Java 8 and version 53.0 = Java 9. My questions are: 1) Why would my app compile in java 9 if I'm using a later version of Java 2) How can I go about getting the app to be compatible with the Java version running on my server
EnriqueGonzalez Expert Licensed User Longtime User Jul 21, 2023 #2 dieterp said: only recognizes class file versions up to 52.0 Click to expand... it says, that recognizes UP to, not that your app was compiled with 52. dieterp said: How can I go about getting the app to be compatible with the Java version running on my server Click to expand... it seems you have java 8 in your server, if you compiled with java 14, install java 14 in your server. Upvote 0
dieterp said: only recognizes class file versions up to 52.0 Click to expand... it says, that recognizes UP to, not that your app was compiled with 52. dieterp said: How can I go about getting the app to be compatible with the Java version running on my server Click to expand... it seems you have java 8 in your server, if you compiled with java 14, install java 14 in your server.
MicroDrie Well-Known Member Licensed User Longtime User Jul 23, 2023 #3 EnriqueGonzalez said: it says, that recognizes UP to, not that your app was compiled with 52. it seems you have java 8 in your server, if you compiled with java 14, install java 14 in your server. Click to expand... Or less impact than upgrading a server OS, install Java 1.8 for B4A and B4J in addition to the Java 14 SDK. In addition to Java SDK version 14.0.1 for my program development on laptop, I use at the same time version 1.8 for B4A running without any problems. Upvote 0
EnriqueGonzalez said: it says, that recognizes UP to, not that your app was compiled with 52. it seems you have java 8 in your server, if you compiled with java 14, install java 14 in your server. Click to expand... Or less impact than upgrading a server OS, install Java 1.8 for B4A and B4J in addition to the Java 14 SDK. In addition to Java SDK version 14.0.1 for my program development on laptop, I use at the same time version 1.8 for B4A running without any problems.
EnriqueGonzalez Expert Licensed User Longtime User Jul 23, 2023 #4 MicroDrie said: Or less impact than upgrading a server OS, Click to expand... I never mentioned upgrading sever OS. MicroDrie said: install Java 1.8 for B4A and B4J in addition to the Java 14 SDK. In addition to Java SDK version 14.0.1 for my program development on laptop, I use at the same time version 1.8 for B4A running without any problems. Click to expand... Latest b4j web server is not compatible with java 8 only java 11 onwards Upvote 0
MicroDrie said: Or less impact than upgrading a server OS, Click to expand... I never mentioned upgrading sever OS. MicroDrie said: install Java 1.8 for B4A and B4J in addition to the Java 14 SDK. In addition to Java SDK version 14.0.1 for my program development on laptop, I use at the same time version 1.8 for B4A running without any problems. Click to expand... Latest b4j web server is not compatible with java 8 only java 11 onwards
MicroDrie Well-Known Member Licensed User Longtime User Jul 24, 2023 #5 Compatibility has never been our strong suit as programmers Upvote 0
