[android-developers] installation error

while installing i got error like"unable to open repository"
the operation cannot be completed for-because one or more required
items cannot be found.
software being installed.android Traceview 16.0.1v.201112150204-238534.

--
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to android-developers@googlegroups.com
To unsubscribe from this group, send email to
android-developers+unsubscribe@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en