When uploading a model, I get this email message saying it failed. It doesn't tell me anything about why its failed. I have uploaded quite a few models that have been successfully printed and have gotten what seems like a reliable process going, and in fact successfully uploaded the counterpart to this model today as well. All the walls in the model are about 3mm thick, its under the 1 million polygon limit, etc. Here's a screenshot of it in netfabb. Doesn't look like it shows any problems, and if I run the repair process anyways, the model still fails the checks. I've attached the stl file in case someone is willing to check it out. Any help would be appreciated, as I don't even know where to find any possible problems.