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jar file to one of those directories, but I went back to Azureus, selected the Plugins -> Installation Wizard. jar files in the various Contents/plugins/az* directories! I probably could have just copied the. There are not so many good Minecraft launchers nowadays, and yet they exist TLauncher being one of them. This checksum is also helpful in ensuring that the launcher (frmsal. A checksum is also used to help ensure that the file is properly matched to the server and its Forms’ version. It is version specific therefore it is not supported to use frmsal.jar from one installation with another.
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But if I try to open them with Jar Launcher it displays the message: 'The Java JAR file 'filename.jar' could not be launched. The frmsal.jar file is the Forms Standalone Launcher. If i run the.jar file using java -jar filename.jar from terminal, they work just fine. Then I noticed, examining the contents of the Azureus application package, that there were a number of. jar files by double-clicking them - opening with Jar Launcher. I tried re-installing Java, removing the Java Preferences, etc., and nothing worked. It was that problem that led me to this forum. I got a similar message when I tried to open several other. Check the Console for possible error messages. I kept on getting the same message from Jar Launcher: The jar file ".jar" couldn't be launched. Depending on which of the steps above you took, the java executable should either launch or launch with a persistent command prompt behind it (which will fill up with Java calls from the app, useful for debugging purposes). jar file that I downloaded from the Azureus site.