<div dir="ltr"><div><div><div><div><div><div><div><div><div><div><div>Hi Debasish,<br><br></div><div><br></div></div>Please read the description at:<br><a href="https://www.ncl.ucar.edu/Document/Functions/Built-in/fbinwrite.shtml">https://www.ncl.ucar.edu/Document/Functions/Built-in/fbinwrite.shtml</a><br><br></div>Specifically:<br><br>"By default, the record marker size at the beginning and end of Fortran
sequential files is assumed to be 4 bytes. In V6.1.1 and later, you
can change this to 8 bytes using the "RecordMarkerSize" option in the
<a href="https://www.ncl.ucar.edu/Document/Functions/Built-in/setfileoption.shtml"><strong>setfileoption</strong></a> procedure."<br><br></div>[1] fortran's default integer is 4-bytes (signed). The range is -2,147,483,648 to 2,147,483,647</div>[2] by default, fortran sequential records are preceded and postpended by a 'hidden' 4-byte value indicating the size of the record.<br></div> [hidden 4-byte value][data_record][hidden 4-byte value]</div>[3] The max value for a signed 4-byte integer is 2,147,483,647 (think 2GB).<br><br></div>So, in a sense, this is a fortran based issue.<br><br>---<br></div>NCL's setfileoption allows the hidden record marker to be set to 8-bytes<br><br></div> setfileoption("bin", "RecordMarkerSize", 8)<b><br></b></div><b> </b> fbinwrite(file_name, foo)<b> </b>; foo is variable<b><br></b><div><div><br><div><div>This can be read via NCL but you must specify that an 8-byte record separator is needed. </div><div><br><div><div><div> setfileoption("bin", "RecordMarkerSize", 8)<b><br></b><b> </b> foo = fbinread(file_name, rec_dims, "float")<b><br><br>---<br></b></div><div>If reading the binary file in a fortran code, it is likely that either (i) a compiler level option will have to be used so that it recognizes that 8-byte separator is being used or (ii) a language extension function (similar to 'setfileoption') must be used.<br><br></div><div>Cheers<br></div></div></div></div></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Mar 5, 2016 at 6:40 PM, Debasish Pai Mazumder <span dir="ltr"><<a href="mailto:debasish@ucar.edu" target="_blank">debasish@ucar.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi All,<br>
<br>
I am trying to write more than 2 Gb values to a binary file and I<br>
received following error message<br>
fatal:fbinwrite: cannot write more than 2 Gb values to a file.<br>
<br>
Is there any way to create this binary file without splitting in to two<br>
files.<br>
<br>
with regards<br>
-Debasish<br>
<br>
<br>
<br>
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