Android ADT error, dx.jar was not loaded from the SDK folder

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This is caused by incomplete/messy upgrade to latest version which results in dx.jar missing from {Android SDK dir}\platform-tools\lib\.

Solution:

Find your latest dx.jar in {Android SDK dir}\platforms\*

and copy it to:

{Android SDK dir}\platform-tools\lib\

Restart eclipse, clean your project and everything should work as expected.

(If platform-tools\lib directory is missing entirely you will have to reinstall “Android SDK platform-tools” using SDK manager. After reinstall dx.jar should be in there so no copying will be needed)

If you can’t find dx.jar in any of {Android SDK dir}\platforms\* subdirs you will have to start SDK manager and install Android 1.6 SDK.

For example on my machine latest was in {Android SDK dir}\platforms\android-4\tools\lib\.
(I did not find any newer version as of 2012-01-22 Android SDK R15).

I really hope that this is useful for someone because I’ve wasted half a day investigating and looking for solution of such a trivial bug… 🙁

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