Sir I have these code, (VFP+SQLSERVER)

Select tj02
Index On Alltrim(acc_code)+Dtoc(Date,1) Tag xyz

It show this error message

Error building key for index "c:\users\admini~1\appdata\local\temp\000074zt0g0d.cdx" tag "Xyz".

I faced this type of error message first time.

How to overcome this?

Please help