Upgrade a Data Set's End-of-File Information

If an improperly closed data set (a data set closed as a result of system error) is opened, the VSAM OPEN routines set a "data set improperly closed" return code to indicate the data set's cataloged information might not be accurate. When the data set is closed properly, VSAM CLOSE resets the "data set improperly closed" indicator but does not upgrade erroneous catalog information that resulted from the system error. Subsequently, when the data set is next opened, its end of data (EOD) and end of key range (EOKR) information might still be erroneous (until VERIFY is entered to correct it), but VSAM OPEN sets the "data set opened correctly" return code.

You can upgrade the EOD and EOKR information so that it is accurate when the data set is next opened by closing the data set and issuing the VERIFY command:

//VERIFY   JOB  ...
//FIXEOD   EXEC PGM=IDCAMS
//SYSPRINT DD   SYSOUT=A
//SYSIN    DD   *
           LISTCAT   ENTRIES(TAROUT) -
                     ALL
           VERIFY    DATASET(TAROUT)
           LISTCAT   ENTRIES(TAROUT) -
                     ALL
/*

The first LISTCAT command lists the data set's cataloged information, showing the data set's parameters as they were when the data set was last properly closed.

The VERIFY command updates the data set's cataloged information to show the data set's real EOD and EOKR values.

The second LISTCAT command lists the data set's cataloged information again. This time, the EOD and EOKR information shows the point where processing stopped because of system error. This information should help you determine how much data was added correctly before the system stopped.

VERIFY will update only the high-used RBA fields for the data set, not any record counts.