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Android: Unknown Error NullPointerException “Android Packaging Problem”

I got the above error when I was renaming some Library projects, there was no obvious code problem, so it was difficult to figure out what is wrong.

I tried the usual following:
  1. Checked all library projects in Properties > Android (they were good)
  2. Project > Clean..
  3. Restart Eclipse

None of the above worked, finally I had to go to .classpath file and deleted the classpath tags and re-added the Reference Libraries, after the project rebuilt the problems cleared.


<classpathentry kind="src" path="Picasa_Library_src"/>





by Uki D. Lucas on Sunday, February 13, 2011
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My favorite quotations..


“A man should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.”  by Robert A. Heinlein

"We are but habits and memories we chose to carry along." ~ Uki D. Lucas

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