I am not sure what could be the problem. Below is an example program I try and it seems to run. If you can post your small program that causes the error,perhaps we can tell what goes wrong.
Example program:
program testme
integer ifile
character*8 calname
calname=‘abc’
ifile=8
open(file=calname,status=“new”,form=“unformatted”, unit=3)
write(3) ifile
close (3)