Because the E2COMM program uses TCP/IP on the z/OS server, the program requires access to the UNIX® System Services (USS) component of z/OS. This means that the IBM RACF® profile for the job or started task must include the RACF Open Edition (OE) segment.

Important

Open Edition is the name formerly used by IBM for Unix System Services. 

The OE segment enables the E2COMM program to have read access to USS in order to issue TCP/IP socket calls. This condition is more likely to be an issue for you if you choose to run the E2COMM program as a started task because most started tasks have more carefully controlled RACF profiles.