When I go to update my apps, I click Download all free updates beacuse I don't want to click 36 time. When I do this a window pops up saying "We could not Complete your iTunes Request. An unknown error occurred (1004)"
And I really need to update my apps, WHAT DO I DO!! Please help me.
I am getting the same error message. Began occuring when I updated to iTunes 9. My guess is a bug in iTunes 9, possible solution, wait for Apple to release update to fix minor bugs in iTunes!
Wow crazy - it is Dec 9th now and still nobody can figure this one out. I am having the same problem. Email support still has not gotten back to me - it has been 3 days now.
For the sake of clarity I will repeat the process mentioned previously by our European friend above.
Quit iTunes
Open System Preferences to the Sharing pane.
Highlight your Computer Name in the top section.
Change this name.
Restart your computer.
Start up iTunes.
I can't say that I understand
why it solves the problem I was having updating my iPhone apps via the iTunes store on my MacBook Pro, but I'm sure glad it does. While I was able to make purchases and update apps on the phone via the App Store, trying to do either in iTunes failed miserably with the cryptic Error 1004 or 1008 messages. I did notice this type of repeated entry showing up in the system log.
Dec 23 23:10:09 duke iTunes[256]: doClip: empty path.
Dec 23 23:10:09 duke [0x0-0x1c01c].com.apple.iTunes[256]: Wed Dec 23 23:10:09 duke.local iTunes[256] <Error>: doClip: empty path.
Perhaps some plist somewhere became corrupted and renaming the computer flushed out the garbage.
Thanks for the solution <yez>. Hope everyone else has the same luck I did with it.