# What to do if an Assembly Step hasn’t produced any results? Please double check the following: * Is your Step's Robot able to deal with the file you are providing it with? The video related robots, for example, will ignore all files except videos. * Does the Step referenced in your Step's `use` parameter produce any result? Are you sure that your Step actually has some input? * If the result of your Step is passed into a subsequent Step, it will not produce a result by default. You can add `result: true` to your Step to force the creation of a result in this case. ## See also: [How can I track uploads for a specific user?](/docs/faq/user-tracking.md) [What do I get for one GB?](/docs/faq/one-gb.md) [How do I restrict selectable upload files?](/docs/faq/filtering3.md)