Oracle Message ORA-09874 - TASDEF_READ: read error, unable to read tasdef@.dbf file.

ERRORTASDEF_READ: read error, unable to read tasdef@.dbf file.
CAUSERead system call returned an error when attempting to read ?/dbs/tasdef@.dbf.
ACTIONCheck errno returned. Sgadef file may be corrupted or incompatible with oracle version.