Hello fellow developers, Ok, so I've finally been able to upload my SmartGWT app into GAE. First of all, if you try to upload your SmartGWT app into GAE without any changes you'll notice an error like: This happens because there are probably more than 1000 files in your generated smartgwt 'sc' dir. So far, the proposed solution to this problem was to use another host (like Amazon S3) for the 'sc'