Futurebasic/Language/Reference/syserror statement

Description
This statement sets the value of FutureBasic's internal  variable. FB sets this variable automatically when you perform disk file operations. The  statement can be used to reset the variable to zero after one of these other operations has set it to a nonzero value. In virtually every case, you will use  (0) as the   parameter.

Note
The internal  variable does not behave like an ordinary variable. For example, you cannot set its value by means of an  or   statement.