Identifying the error message source

Two types of error messages can occur when you run ISMF:

Error messages issued by other subcomponents that interrupt the screen
See Figure 1 for an example of a TSO/E message that can interrupt the screen. See Messages issued by other subcomponents to diagnose the error.
Figure 1. ISMF—TSO/E Messages That Interrupt the Screen
```
CSV003I REQUESTED MODULE DGTFTCMD NOT FOUND
***



 
```

ISMF or ISPF short error messages

Figure 2 is an example of an end-user ISMF panel with the short message:

COMPRESS FAILED

ISPF short error messages have the same format. To determine whether ISMF or ISPF issued the error message, see Identifying an ISMF error message.

Figure 2. ISMF—End User Short Error Message

                                  VOLUME LIST                   COMPRESS FAILED
 COMMAND ===> COMPRESS                                         SCROLL ===> HALF
                                                          Entries 1-14 of 37
 ENTER LINE OPERATORS BELOW:                              Data Columns 3-8 of 39

     LINE       VOLUME  FREE     %     ALLOC    FRAG   LARGEST  FREE
     OPERATOR   SERIAL  SPACE    FREE  SPACE    INDEX  EXTENT   EXTENTS
    ---(1)----  -(2)--  --(3)--  (4)-  --(5)--  -(6)-  --(7)--  --(8)--
    ?COMPRESS   SCR001  1342355    72   523197    122   793299       25
                SCR002  1113616    60   751936     25  1067335       15
                SCR003  2835621    99    39669      1  2830511        4
                SCR004  2859732    99    15558      1  2856345        3
                SYS300   353342    19  1512210    270   164468      109
                SYS301   363133    19  1502419    113   311792       79
                SYS302   396767    21  1468785    224   165312       72
                SYS303   345098    18  1520454    234   254689      264
                SYS304   398781    21  1466771    135   333762      159
                SYS305   402200    22  1463352     98   354982       81
                SYS306   571072    31  1294480     65   513361       49
                SYS307   385102    21  1480450    104   321114       56
                SYS308   385805    21  1479747    237   156927       83
                SYS309   367068    20  1498484     88   326173       60

USE HELP COMMAND FOR HELP; USE END COMMAND TO EXIT.