Error ocurring in the thinning process

Today I wantetd to upload my app to appstore, just a small change, from application loader there is no error, but i get an email that says

While processing your iOS app, Das Kroatische Küstenpatent -, errors occurred in the app thinning process, and your app couldn’t be thinned. If your app contains bitcode, bitcode processing may have failed. Because of these errors, this build of your app will not be able to be submitted for review or placed on the App Store. For information that may help resolve this issue, see Tech Note 2432.

the build is listet in the activiries but I cannot choose that build to upload.

Please help. I also tried to disable bit new compilation in Itunes under Prices and Functions

regards

Michael