Files are transferred from the client to the server using a chunked RMI upload. The file is split into manageable pieces and then sent to the server where it is reconstructed and inserted into persistent storage. This capability is only accessible to applet clients and is available as a standard bean within Windchill core. This bean has direct access to the client's file system. It can upload files with the RMI transfer, and it can remove and replace files from the Windchill system.

Be aware that this upload architecture addresses limitations in some browser's Java HTTP classes. The HTTP upload procedure is still available, but PTC does not recommend using it for content upload from an applet. Downloads from the Windchill server via HTTP do not exhibit the same limitations as uploads, and downloads can still use the HTTP architecture described below.