The text of the error message associated with the operating system status value, SYSTAT, is assigned to the named message token. If the token is already defined, the message is appended to the existing token value.

CALL ERR_SYSER( TOKEN, SYSTAT )

TOKEN = CHARACTER $\ast$ ( $\ast$ ) (Given)

SYSTAT = INTEGER (Given)

The messages generated using this facility will depend on the computer system upon which the library is implemented.