floating point control registers can be accessed only in scope 0
Facility: DEBUG, VMS Debugger
Explanation: An attempt was made to reference a floating point
control register from a scope other than scope 0. DEBUG will not
accept a command which specifies any other scope for a floating
point control register.
User Action: If the current scope has been set to a scope other
than scope 0 (using the SET SCOPE command), use an explicit
0\pathname to access the floating point control register.