invalid signature file

Development Tools IDE 1.x
1

I am trying to get Arduino.1.6.4 to run, but after it initializing packages I get a popup window with
"invalid signature file digest for Manifest main attributes"

And in the console output I get

pi@BrPi ~ $ arduino
java.lang.SecurityException: Invalid signature file digest for Manifest main attributes
	at sun.security.util.SignatureFileVerifier.processImpl(SignatureFileVerifier.java:287)
	at sun.security.util.SignatureFileVerifier.process(SignatureFileVerifier.java:240)
	at java.util.jar.JarVerifier.processEntry(JarVerifier.java:317)
	at java.util.jar.JarVerifier.update(JarVerifier.java:228)
	at java.util.jar.JarFile.initializeVerifier(JarFile.java:348)
	at java.util.jar.JarFile.getInputStream(JarFile.java:415)
	at sun.misc.URLClassPath$JarLoader$2.getInputStream(URLClassPath.java:775)
	at sun.misc.Resource.cachedInputStream(Resource.java:77)
	at sun.misc.Resource.getByteBuffer(Resource.java:160)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:436)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	at cc.arduino.contributions.packages.ContributionsIndexer.isSigned(ContributionsIndexer.java:153)
	at cc.arduino.contributions.packages.ContributionsIndexer.parseIndex(ContributionsIndexer.java:73)
	at processing.app.BaseNoGui.initPackages(BaseNoGui.java:600)
	at processing.app.Base.<init>(Base.java:271)
	at processing.app.Base.guardedMain(Base.java:215)
	at processing.app.Base.main(Base.java:128)
cc.arduino.contributions.SignatureVerificationFailedException: package_index.json file signature verification failed
	at cc.arduino.contributions.packages.ContributionsIndexer.parseIndex(ContributionsIndexer.java:74)
	at processing.app.BaseNoGui.initPackages(BaseNoGui.java:600)
	at processing.app.Base.<init>(Base.java:271)
	at processing.app.Base.guardedMain(Base.java:215)
	at processing.app.Base.main(Base.java:128)
pi@BrPi ~ $

Any idea's on what is wrong or how to get past this ??

Thankz
Have A Great Day
ShorTie

2

I was getting a different but similar message (which I no longer have in my scroll-back) about an invalid json file signature. It's spooky but it went away when I moved away my arduino-1.6.4 directory and re-extracted. Even though, as far as I can tell, there is no difference between the old and new directories. I may as well have burnt some sage.

pix