The POS command

You can use the Position (POS) command (only with DEDBs) to perform the following functions.

Retrieve the location of a specific sequential dependent segment, or retrieves the location of the last inserted sequential dependent segment.
Tell you the amount of unused space within each DEDB area. For example, you can use the position information that IMS returns for a POS command to scan or delete the sequential dependent segments for a particular time period.

For the syntax of the POS command, see the topic "POS Command" in IMS Version 15.2 Application Programming APIs.

If the area the POS command specifies is unavailable, the I/O area is unchanged and the status code FH is returned.