I don't recall what the source level backwards compatibility is. But that message means you are trying to use .class files compiled for Java 8 on an earlier JVM (1.6 clearly). You will need to either upgrade the server or re-compile from source targeting 1.6.
Chuck P.S. Java 1.6?!!? On 2018-09-30, 8:59 PM, "Webobjects-dev on behalf of ocs@ocs" <[email protected] on behalf of [email protected]> wrote: Hi there, is is possible that WOnder 7 is not compatible with Java 6? Whatever I try, I can't find any description on the Web; what I am getting though is an error === Exception in thread "main" java.lang.UnsupportedClassVersionError: er/extensions/appserver/ERXApplication : Unsupported major.minor version 52.0 === on a client's server, where there is === 53 # java -version java version "1.6.0_65" Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-10M4609) Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode) 54 # === On all my machines, where happen to be Javas 8-10, the application runs all right. Thanks for any insight, OC _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/webobjects-dev/chill%40gevityinc.com This email sent to [email protected] _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [email protected]
