The sending node sends an end-of-file control record when transmission for the stream is complete, as shown in Figure 1

Figure 1. Protocols Used to Transmit a Stream

When transmission complete (T C or RCB X'CO') is received, the sender may purge all copies of the job on his own system. It may not do so before RCB X'CO' is received. At this point the stream is logically closed. It is also valid to receive an RCB X'BO' in response to an end-of-file when the receiver wishes to abort the file.