Handling environment errors (register 0=10)

In general, this category requires action by a VTAM® operator or terminal operator or program support representative because the LU, or some communication element between the application program and the LU, is permanently or temporarily unavailable. One or more of the following might be done:

Send a message to the VTAM operator.
Send a message to any log that is being kept in addition to the error logs being kept by VTAM.
Send a request to a master LU.
Send a request to an LU that is associated with the LU for which action is required.

If the error is temporary, the program can set a flag and retry the operation at a later time or set up an ECB that, when posted, indicates that external action has taken place and the operation can be resumed. If the error is permanent, the session with the LU (and perhaps other LUs associated with the failing LU) must be terminated. If the program is dependent on the LU, the program must terminate.