“Invalid signature file” when attempting to run a .jar

Question

My java program is packaged in a jar file and makes use of an external jar library, bouncy castle. My code compiles fine, but running the jar leads to the following error:

Answer 1

I had a similar problem. The reason was that I was compiling using a JDK with a different JRE than the default one in my Windows box.

Using the correct java.exe solved my problem.