I have problem of index files always corrupted. I use clip5.2 & clip5.3 as well, with .Ntx files as indexes. I know that index files quite frequent corrupted. But just want to know that how big size of database file will cause index files easy corrupted. I know that a DBF can hold a billion of records (depend on the number of fields as well). But a billion record equaivalent to how many bytes for the DBF file, i need in term of bytes instead of number of records. Please help me. Thanks!