Driver can’t respond to this Control call.

Driver can’t respond to this Status call.

Driver can’t respond to Read calls.

Driver can’t respond to Write calls.

Driver reference number doesn’t match unit table.

Driver reference number specifies NIL handle in unit table.

Requested read/write permission doesn’t match driver’s open permission.



Attempt to remove an open driver.

Couldn’t find driver in resource file.

I/O request aborted.

Driver isn’t open.