Hola Francisco, he tenido ese problema en VFP 6, en mi caso son formas o classes dañadas, generalmente sucede si no se apaga la máquina apropiadamente, la única forma de recobrarlas fue restaurando mi respaldo, ya que el archivo en si no contiene mas que basura.

Translation :

Hi Francisco, I've had this problem in VFP 6, in my case on corrupted forms or class libraries, it usually happens if the compter is not shut down properly, the only way to recover them was by restoring from a backup, since the file itself only contained garbage.

>How can I solve the following problem? "Not is a database file" In FoxPro 2.6a and Visual FoxPro 6