DBFCDX/1055 DBF Signature Invalid
Explanation: This error indicates that the signature field of the
.dbf is invalid. Reasons for this error include:
1. Trying to use a non-DBF file as a .dbf.
2. Corruption of the .dbf.
3. Trying to use a file with a .dbt memo-field.
Action: Recreate the .dbf as a valid CA-Clipper .dbf