Dear James,
You can get around this by having an artificial SIGFP. Two ways,
you can assign an existing column to SIGFP i.e.
LABIN FP=FP SIGFP=FP
I am not sure if refmac will complain about this because MTZ data columns
have a type 'F' for magnitudes and 'Q' for errors.
Secondly you could use `sftools` to generate a SIGFP. Look at the doc
and use the CALC option, it could be 1/10th of FP for example. This is just
a convenience and not intended to generate a valid SIGFP.
Adam
