This does not answer my question. I asked about E-Check of the produced boards. Reading
Please note that we ignore any IPC file that comes from unsupported EDA-applications. If you want Smart Tests, please upload your CAD file, or follow the described upload method for supported EDA-applications. Please have a look here to see for which EDA-applications we support Smart Tests.
lets me assume IPC file in a pure Gerber upload is ignored!