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<div class="moz-cite-prefix">I cannot say for sure, but I would
suspect that it is caused by an Intel Fortran bug.<br>
<br>
Previously, you reported an "end-of-file during read" error [1]
with intel/2017 [2]. And now, you report "BACKSPACE error", which
is another file reading error. Maybe the errors observed in 2016
Update 3 [3] haven't entirely been resolved in intel/2017. <br>
<br>
Did this error occur when WIEN2k was compiled with -O0? If not, I
suggest trying it to see if the error goes away or not.<br>
<br>
Version 15 had a BACKSPACE bug in the run-time library (RTL) [4].
So if there is a bug, it might come from this library. Have you
tried the calculation when WIEN2k was compiled with the dynamic
libraries, then again with the static libraries using the Intel
link advisor [5]? If not, you might give that a try. I think I
encountered a Fortran bug once in one of the buggy 12 versions
were an error occurred with the dynamic libraries, but not with
the static ones. Though, maybe it won't help in this case, since
it looks like the static and dynamic linking uses the same library
file (libiomp5.so) [6].<br>
<br>
How large is the 1Mn.vectordn_1 file in size? Do these errors
only occur with calculations with large files sizes and smaller
file size calculations using the same sequence of WIEN2k program
commands work fine? Perhaps it could be a big data issue if that
is the case. I don't remember where I saw it, but I thought I
read somewhere that when there are clusters and big data are
involved, they can be more complex to handle.<br>
<br>
I don't know if there is a boundary limit on the amount of data
BACKSPACE can handle [7]. I'm not able to see from the Intel
documentation whether say a small BLOCKSIZE [8,9] could slow down
the read, perhaps lead to a time out, and cause such an error.
Also, it is not clear whether or not it could be caused by a
memory leak or memory limit from BACKSPACE using n - 1 successive
READs [10, 11]. It might help to ask the experts about the error
on the Intel forum [12].<br>
<br>
[1]
<a class="moz-txt-link-freetext" href="http://zeus.theochem.tuwien.ac.at/pipermail/wien/2017-March/026101.html">http://zeus.theochem.tuwien.ac.at/pipermail/wien/2017-March/026101.html</a><br>
[2]
<a class="moz-txt-link-freetext" href="http://zeus.theochem.tuwien.ac.at/pipermail/wien/2017-March/026106.html">http://zeus.theochem.tuwien.ac.at/pipermail/wien/2017-March/026106.html</a><br>
[3]
<a class="moz-txt-link-freetext" href="https://software.intel.com/en-us/articles/read-failure-unformatted-file-io-psxe-16-update-3">https://software.intel.com/en-us/articles/read-failure-unformatted-file-io-psxe-16-update-3</a><br>
[4]
<a class="moz-txt-link-freetext" href="https://software.intel.com/en-us/forums/intel-visual-fortran-compiler-for-windows/topic/549033">https://software.intel.com/en-us/forums/intel-visual-fortran-compiler-for-windows/topic/549033</a><br>
[5]
<a class="moz-txt-link-freetext" href="https://software.intel.com/en-us/articles/intel-mkl-link-line-advisor">https://software.intel.com/en-us/articles/intel-mkl-link-line-advisor</a><br>
[6] <a class="moz-txt-link-freetext" href="https://software.intel.com/en-us/node/528514">https://software.intel.com/en-us/node/528514</a><br>
[7]
<a class="moz-txt-link-freetext" href="https://software.intel.com/en-us/forums/intel-visual-fortran-compiler-for-windows/topic/274239">https://software.intel.com/en-us/forums/intel-visual-fortran-compiler-for-windows/topic/274239</a><br>
[8]
<a class="moz-txt-link-freetext" href="http://kiwi.atmos.colostate.edu/rr/tidbits/intel/macintel/doc_files/source/extfile/optaps_for/fortran/optaps_prg_io_f.htm">http://kiwi.atmos.colostate.edu/rr/tidbits/intel/macintel/doc_files/source/extfile/optaps_for/fortran/optaps_prg_io_f.htm</a><br>
[9] <a class="moz-txt-link-freetext" href="https://software.intel.com/en-us/node/678835">https://software.intel.com/en-us/node/678835</a><br>
[10]
<a class="moz-txt-link-freetext" href="https://software.intel.com/en-us/forums/intel-visual-fortran-compiler-for-windows/topic/593848">https://software.intel.com/en-us/forums/intel-visual-fortran-compiler-for-windows/topic/593848</a><br>
[11] <a class="moz-txt-link-freetext" href="https://software.intel.com/en-us/node/692589?language=en">https://software.intel.com/en-us/node/692589?language=en</a><br>
[12]
<a class="moz-txt-link-freetext" href="https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x">https://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x</a><br>
<br>
On 3/21/2017 8:46 AM, Md. Fhokrul Islam wrote:<br>
</div>
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<div>Hi Prof Blaha and Wien2k users,</div>
<div><br>
</div>
<div>I am running a surface supercell calculation with
spin-orbit interaction using non-scf</div>
<div>method. While LAPW1 worked fine and produced the energy
and scf1 files correctly,</div>
<div>LAPWSO failed with BACKSPACE error. Please see the error
message below. I have checked </div>
<div>the get_nloat.f file and while there is a BACKSPACE
statement in line 22 but it is <span style="font-size:
12pt;">not </span></div>
<div><span style="font-size: 12pt;">obvious to me why there is
a problem to execute this line. Somewhere it seems to have</span></div>
<div><span style="font-size: 12pt;">generated an '<span
style="font-family: Calibri, Arial, Helvetica,
sans-serif; font-size: 16px;">forrtl: Invalid argument'
after LAPW1 but not sure why.</span> I am using
Wien2k_16 </span></div>
<div><span style="font-size: 12pt;">which I </span><span
style="font-size: 12pt;">have compiled with intel/2017.</span></div>
<div><br>
</div>
<div><span style="font-size: 12pt;"> LAPW1 END</span><br>
</div>
<div> LAPW1 END</div>
<div> LAPW1 END</div>
<div> LAPW1 END</div>
<div> LAPW1 END</div>
<div> LAPW1 END</div>
<div> LAPW1 END</div>
<div> LAPW1 END</div>
<div>forrtl: Invalid argument</div>
<div>forrtl: severe (23): BACKSPACE error, unit 9, file
/scratch/1Mn.vectordn_1</div>
<div>Image PC Routine
Line Source</div>
<div>lapwso 0000000001D5AFBC Unknown
Unknown Unknown</div>
<div>lapwso 0000000001D57771 Unknown
Unknown Unknown</div>
<div>lapwso 00000000004305D6 get_nloat_
22 get_nloat.f</div>
<div>lapwso 0000000000419F2F MAIN__
144 lapwso.F</div>
<div>lapwso 000000000040442E Unknown
Unknown Unknown</div>
<div>libc-2.23.so 00002AF2B4B9A830 __libc_start_main
Unknown Unknown</div>
<div>lapwso 0000000000404329 Unknown
Unknown Unknown</div>
<div><br>
</div>
Any suggestion will be appreciated.
</div>
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Thanks,</div>
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Fhokrul</div>
</div>
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