Error switch

In L mode, there are two error switches, the EDT error switch and the DMS error switch. The EDT error switch is set for the majority of messages. It indicates incorrect EDT statements. The DMS switch is set for messages that are output on file or system access errors. For some messages, both the EDT and DMS error switches are set. There are also messages for which no switch is set (e.g. information, confirmation queries, messages which are only output in F mode). The error switches can be queried in EDT procedures (see the @IF (format 1) and @RESET statements in chapter 9). Whether or not an error switch is set is indicated in the message help texts