Fortran Open error iostat=30 gerror returns "broken pipe"

Hi,

on some occasions, the OPEN statements returns with IOSTAT=30 and GERROR() returns the string "broken pipe".

        OPEN(UNIT=IUNIT,FILE=ICFILE,ACTION='READWRITE',ACCESS='SEQUENTIAL'
     *      ,STATUS='REPLACE',FORM='FORMATTED',BLANK='NULL'
     *      ,IOSTAT=JIOS,ERR=930)

Compiled with /VMS switch. Sometimes the file in question has been opened for reading and closed, the file is not in the local file system but on a network share, the filename is fully qualified with drive letter, path etc.

Any ideas where to look? And is there a better method to get more information than GERROR()?

Thanks

Lothar