Database repair with DSE requires more skill, and potentially more time than the other approaches. Using DSE requires vigilant attention to, and a clear understanding of, GDS. DSE can generally access and change almost any data in the database file. When using DSE, you assume the responsibility that GT.M normally carries for ensuring the integrity of the database structure. Because DSE may be used concurrently with other processes, updates by concurrent processes may interfere with repair actions. When possible, prevent other users from accessing the region during repairs.

If you elect to repair the database, you may want to seek assistance from an available source of expertise such as Fidelity Information Services or your GT.M Value Added Reseller (VAR). If your organization plans to perform repairs beyond straightforward corrections to the file header, Fidelity Information Services strongly recommends that the responsible person(s) familiarize themselves with the material in the INTEG section of the MUPIP chapter, the GDS and DSE chapters, and this chapter. Fidelity Information Services recommends using DSE on test files, in advance of any work on production files.