As you can see from the error message, the DCLIST.ld4 file is stored in the DCASP directory, which means that it is a program file. It is written to everytime a data integrity check is run (the full check, not just a single entry check).

Has there been any other upgrades installed for either the System Manager or network service packs? If it has been working for some time, then something else must have changed or be different to get this error.