Dx bad class file magic (cafebabe) or version (0033.0000) with ADK14

Question

Since moving to ADK14, I have been unable to build new apks for release on my Windows 7 system.

Building fails with \"conversion to dalvik format failed with error 1

Answer 1

Compiling with Java 6 instead of 7 worked for me, but only after I configured Eclipse to "know about" my JRE6 install path. Previously I only had the JRE7 set up in Eclipse. I could set my compiler compliance level to 1.6 or 1.5 but apparently without the corresponding JRE it didn't really have any effect. I don't really understand why that should be--what does the JRE have to do with compiling, and what does it have to do with Android code?