Amrit,

>I am using Append From ? Type XLS
>and facing Fatal exception error.
>Do anyone has idea to get rid of it.

What VFP version are you using? IIRC, problem similar to yours was corrected in VFP6SP5.

>Can I Import that xls to an existing table. (To try to use Import instead of Append From)?, Yes, I know that import can be done in new file, but is there any way to import to existing table?

No, you cannot import into existing table using VFP IMPORT command.