[Groff] grohtml: macro error: RP is not allowed after the first page has started

[Anton Shterenlikht]

I get this error:

./doc.1:4: macro error: RP is not allowed after the first page has started

The command I invoke is:

/usr/local/bin/groff -ept -ms -Thtml -P -Dhtmlimg -P -r -VV doc.ref > doc.html

where doc.ref is the file after processing with soelim
and refer.
doc.ref has:

.lf 1 doc.full
.lf 1 ./doc.1
.\"$Id: doc.1 57 2016-04-13 14:34:10Z mexas $
.\" Copyright (c) 2016 Anton Shterenlikht, The University of Bristol
.\" See LICENSE for licensing conditions
.RP no
.na
.hy 0
.EQ
delim ##
.EN
.DA
.TL
Parallel programming with Fortran 2008 coarrays
.AU

and so on.

What am I doing wrong?

Thanks

Anton