Error: Comma required after P descriptor in format string

When I try to compile calrank.for (CALRANK_v7.0.0_L140912.zip) with gfortran I get this error:

> gfortran  -m64 -c -o calrank.o calrank.for
calrank.for:1922:32:
         write(io,'(2f10.3,1p1000(2x,e16.7,1x,2a10,1x))')
                                1
Error: Comma required after P descriptor in format string at (1)

When I make a comma I got the same error.
I note only that the code was compiled before with LF95.

   subroutine xycout(io,nrank,nsp)
      use userinf
      use header
      use rankdata

      implicit none

    integer :: io,nrank,nsp
      integer :: k,ir,is,i
      character(len=20)   :: head1,head2,head3
      character(len=40)   :: add1x,add2x,add3x
      character(len=40)   :: add1(nsp),add2(nsp)
      character(len=40)   :: add3(nsp)
 ......
 c --- Loop over receptors to write data records
      do ir=1,ntotrec(k)
         write(io,'(2f10.3,1p1000(2x,e16.7,1x,2a10,1x))')
     &                   xreckm(ir,k),yreckm(ir,k),
     &                  (xounit(is,k)*rankvalue(ir,is,nrank),
     &                   arankdate(ir,is,nrank),
     &                   aranktime(ir,is,nrank),is=1,nspout(k))
      enddo

      return
      end

Some variables are defined in other place of the code as:

c --- Real arrays for header (derived)
      allocate (xreckm(mxrec,k),yreckm(mxrec,k))
c --- Modified units multiplier
      allocate (xounit(mxspout,k))
      c --- Array of values (all species, receptors) for requested ranks
      allocate (rankvalue(ntotrec(k),nspout(k),n_ranks))
      allocate (arankdate(ntotrec(k),nspout(k),n_ranks))
      allocate (aranktime(ntotrec(k),nspout(k),n_ranks))
c --- Integer arrays for header
      deallocate (ndrec,nctrec,nspout,i2dmet,iutmzn)

Solution

You should do exactly what the error message says, put a comma after the p descriptor:

write(io,'(2f10.3,1p,1000(2x,e16.7,1x,2a10,1x))')

If you do not know what a p descriptor is, see, for example here, or any tutorial about Fortran edit descriptors. As Steven Lionel comments below, you can use the p descriptor without a comma in front of normal data edit descriptors.