Hi, I was trying to attach a file over 5Mb and the following error message appeared: After some research from the error message, i was redirected to the codeplex website, and instantly i remembered, from here i’m using a solution for the auto number, is possible that the error comes from there? Yes, it is. So, from this article, i saw that the solution is deactivate the step that gives the auto number for the entity, and register only the step for the entities that we need.