>i want to ignore this message
> "stuctural cdx or idx not found"
> programatically
Then you should open the table lowlevel first and remove CDX reference.

handle=fopen("mytable.dbf",12)
=fseek(handle,28)
lnPokeByte = bitand(fread(handle,1),0xFE) && Remove CDX flag
=fseek(handle,28)
=fwrite(handle,lnPokeByte,1)
=fclose(handle)

Of course you should also check if you can have the handle and why not too.
Cetin