Android: How to find out why app launch failed?

I am attempting to launch a simple test app on the Android emulator (developing in Eclipse 3.6 on Windows).

Here is the logcat result:

[2011-05-11 11:35:49 - androidtest] Android Launch!
[2011-05-11 11:35:49 - androidtest] adb is running normally.
[2011-05-11 11:35:49 - androidtest] Performing androidtest.AndroidTestActivity activity launch
[2011-05-11 11:35:49 - androidtest] Automatic Target Mode: Preferred AVD 'HTC_Incredible' is available on emulator 'emulator-5554'
[2011-05-11 11:35:49 - androidtest] Uploading androidtest.apk onto device 'emulator-5554'
[2011-05-11 11:35:49 - androidtest] Installing androidtest.apk...
[2011-05-11 11:38:40 - androidtest] Failed to install androidtest.apk on device 'emulator-5554!
[2011-05-11 11:38:40 - androidtest] (null)
[2011-05-11 11:38:41 - androidtest] Launch canceled!

How can I determine why this launch failed?

Solution

This looks like the Eclipse Console output and not the LogCat. The LogCat output might provide a clue to what goes wrong.

I know from experience that the adb doesn't always work properly when it has been running for a while, so killing the adb.exe process and restarting it might also help.