local llError, lcError

* Adding following line along with lcError declaration
lcError = ON("Error")
on error llError = .T.

* The following is the line (or lines) that could cause an error
use MyTable

* Adding following line
on error &lcError

if llError
  MessageBox("The file could not be opened; please try again later.")
  * Or do some more detailed analysis, e.g. with aerror()
else
  * Go ahead, and do whatever you would with the table
endif