Thanks for the tip, and I think you're onto something! I was trying to be fully explicit, but taking it out seems to have solved the problem. It would have been nice to get a more meaningful error, but I'll take a fix when I can get it!

Unfortunately, not. The command I'm trying is: xcodebuild archive -project ProjectName.xcodeproj -scheme SchemeName -sdk iphoneos -configuration release -allowProvisioningUpdates -destination 'generic/platform=iOS' -archivePath "$ARCHIVE_DIR/$ARCHIVE_NAME". Does anything else jump out at you about that?