External Product Interface › EPI Failure Recovery › EPI Command Failures

EPI Command Failures

An EPI command can fail for a variety of reasons:

• An EPI system failure
• An EPI session failure
• The application that will process the command fails

With the exception of the first two cases, the EPI automatically recovers from EPI command failures.

In most cases, the command issuer receives a message to show the specific cause of the command failure (that is, session disabled, VTAM shutdown, application logged off) and a negative return code from the last issued EPI host command.

If possible, the EPI also writes a message to the system log to identify a failing EPI command.