in my restore procedure i wrote
open data xyz
.... do some thing......

close data all
.... restore data from a zip file with winzip command line ...

some times ok but some time error message
Error: The process cannot access the file because it is being used by another process.
Cannot create .\xyz.dbc

it means close data all command some time cannot close database xyz.dbc
can anyone tell me why and how to close it ?????