https://community.intel.com/t5/Intel-Fortran-Compiler/unit-number/m-p/909447#M83084 <DIV style="margin:0px;"> <DIV id="quote_reply" style="width: 100%; margin-top: 5px;"> <DIV style="margin-left:2px;margin-right:2px;">Quoting - <A href="https://community.intel.com/en-us/profile/442526">intelhelp2009</A></DIV> <DIV style="background-color:#E5E5E5; padding:5px;border: 1px; border-style: inset;margin-left:2px;margin-right:2px;"><EM>How to find which unit number represents which device? For example, in<BR /><BR />open (unit =8, ...)<BR /><BR />what does "8" represent?<BR /><BR /></EM></DIV> </DIV> </DIV> A few brands of Fortran (not Intel) would pre-assign unit 8, perhaps as error output, or a shell command might have assigned it. OPEN normally would over-ride any pre-connection. Otherwise, choice of 8 or some other number would be arbitrary, but OPEN would have to specify a device or file name. Fortran INQUIRE gives your program some facilities to find out the properties associated with a unit. <BR /> Fri, 16 Oct 2009 18:29:21 GMT TimP 2009-10-16T18:29:21Z https://community.intel.com/t5/Intel-Fortran-Compiler/unit-number/m-p/909446#M83083 How to find which unit number represents which device? For example, in<BR /><BR />open (unit =8, ...)<BR /><BR />what does "8" represent?<BR /><BR />Thanks! Fri, 16 Oct 2009 17:59:59 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/unit-number/m-p/909446#M83083 intelhelp2009 2009-10-16T17:59:59Z https://community.intel.com/t5/Intel-Fortran-Compiler/unit-number/m-p/909447#M83084 <DIV style="margin:0px;"> <DIV id="quote_reply" style="width: 100%; margin-top: 5px;"> <DIV style="margin-left:2px;margin-right:2px;">Quoting - <A href="https://community.intel.com/en-us/profile/442526">intelhelp2009</A></DIV> <DIV style="background-color:#E5E5E5; padding:5px;border: 1px; border-style: inset;margin-left:2px;margin-right:2px;"><EM>How to find which unit number represents which device? For example, in<BR /><BR />open (unit =8, ...)<BR /><BR />what does "8" represent?<BR /><BR /></EM></DIV> </DIV> </DIV> A few brands of Fortran (not Intel) would pre-assign unit 8, perhaps as error output, or a shell command might have assigned it. OPEN normally would over-ride any pre-connection. Otherwise, choice of 8 or some other number would be arbitrary, but OPEN would have to specify a device or file name. Fortran INQUIRE gives your program some facilities to find out the properties associated with a unit. <BR /> Fri, 16 Oct 2009 18:29:21 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/unit-number/m-p/909447#M83084 TimP 2009-10-16T18:29:21Z https://community.intel.com/t5/Intel-Fortran-Compiler/unit-number/m-p/909448#M83085 <DIV style="margin:0px;"></DIV> The intrinsic module ISO_FORTRAN_ENV defines constants for the default input, output and error units. However, if you OPEN the unit, that is overridden, Unit 8 has no special meaning in Intel Fortran. You can use INQUIRE to see if a file is opened on a unit and, if so, what its name is.<BR /> Fri, 16 Oct 2009 19:25:50 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/unit-number/m-p/909448#M83085 Steven_L_Intel1 2009-10-16T19:25:50Z