sure . looks like it can't access it, even though i downloaded it a couple times. Here's the read out:" Error: Unable to access jarfile propulsive-paint.jar" I just copied what you had into my command prompt. I'm running windows 10 and i just downloaded the newest version of java. might just be my pc too. it's old and its drivers are wonky. other games have been working though... yours is the first jar file however.
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Hmmm, it looks like a Windows only error message. Unfortunately I don't have a Windows machine to test this out, but it seems there are multiple things that could be causing this: wrong path specified in the command, corrupt jar file, wrong arguments specified in the command (also see https://stackoverflow.com/questions/11943948/what-causes-unable-to-access-jar-fi...). Since it's worked for others I'm going to assume it's not corrupt, and since I've tested this with Java 10 as well, I'm guessing that's not it either. Perhaps when running the command, the JAR file isn't located in the same folder as where you're in (in the terminal)? I'm afraid I can't really help much with this.