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<div>Process and explorer only shows current locks, and this seems to be a quick, transient state. If you are curious which process caused the conflict, you can use Process monitor tool, which can log all access from all processes to all files.<br>
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It is not that relevant though which process is that, because there is countless applications that legitimately lock files for short time periods.
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Andras<br>
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<div style="border:none; padding:3.0pt 0cm 0cm 0cm"><span style="font-size:11.0pt; font-family:'Calibri','sans-serif'"><b>From:</b> Isaiah Norton <isaiah.norton@gmail.com><br>
<b>Sent:</b> Friday, September 28, 2018 4:28 PM<br>
<b>To:</b> andrew.amaclean@gmail.com<br>
<b>Cc:</b> vtkdev; David Gobbi; Brad King<br>
<b>Subject:</b> Re: [vtk-developers] Python Wrapping fails in master build.<br>
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<div dir="ltr">FWIW, I've debugged similar issues in the past by using Process Explorer [1]. You can search for the file name with 'Find' menu -> 'Find handle or DLL', enter filename, then see which process(es) are holding it.</div>
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<div dir="ltr">[1] <a href="https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fsysinternals%2Fdownloads%2Fprocess-explorer&data=02%7C01%7Classo%40queensu.ca%7Cd7206544455d4737523f08d62580f879%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636737633197117478&sdata=4AvMsS9HzSbzrFHzwgWGnfFc9wU04PtLvSVSl3w0IEs%3D&reserved=0" originalsrc="https://docs.microsoft.com/en-us/sysinternals/downloads/process-explorer" shash="fZtZWfpBHrKKVDem4+mT4Gf9e6qq7gMWVd1TSfsydwzIrFPXBVCagTpCNeGBy/pJhjBfwu/BhMjhwpDt/Jig3S1SThDKMxpU8RTLHwStv5Ek4z8Z1LltK4iKrkQAyNtX49kSy1WjhZq0tq8IIxCx9PwIac9pCOfsLRLJrEizqH8=" target="_blank">
https://docs.microsoft.com/en-us/sysinternals/downloads/process-explorer</a>
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<div>- </div>
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<div dir="ltr">On Fri, Sep 28, 2018 at 12:14 AM Andrew Maclean <<a href="mailto:andrew.amaclean@gmail.com" target="_blank">andrew.amaclean@gmail.com</a>> wrote:<br>
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<div class="gmail_default" style="font-size:small">Just did a build and I have one failure:</div>
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<div class="gmail_default">[381/4832] Python Wrapping - generating vtkRungeKutta2Python.cxx</div>
<div class="gmail_default">FAILED: Wrapping/Python/vtkRungeKutta2Python.cxx </div>
<div class="gmail_default">cmd.exe /C "cd /D C:\Users\amaclean\Development\Kitware\build\VTK-Release\Wrapping\Python && C:\Users\amaclean\Development\Kitware\build\VTK-Release\bin\vtkWrapPython-9.0.exe @C:/Users/amaclean/Development/Kitware/build/VTK-Release/Wrapping/Python/vtkCommonMathPython.Release.args
-o C:/Users/amaclean/Development/Kitware/build/VTK-Release/Wrapping/Python/vtkRungeKutta2Python.cxx C:/Users/amaclean/Development/Kitware/src/VTK/Common/Math/vtkRungeKutta2.h"</div>
<div class="gmail_default">Error 13 opening output file C:/Users/amaclean/Development/Kitware/build/VTK-Release/Wrapping/Python/vtkRungeKutta2Python.cxx: Permission denied</div>
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<div dir="ltr">On Thu, Sep 27, 2018 at 2:23 AM David Cole <<a href="mailto:DLRdave@aol.com" target="_blank">DLRdave@aol.com</a>> wrote:<br>
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<blockquote class="gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
Is it possible that there might be two custom commands trying to write<br>
to the same output file, and it only shows up in ninja because it's<br>
better at parallel builds...?<br>
<br>
Or is it absolutely certain that there's a one-rule/one-output-file<br>
correspondence?<br>
<br>
<br>
David C.<br>
On Wed, Sep 26, 2018 at 10:58 AM Andras Lasso <<a href="mailto:lasso@queensu.ca" target="_blank">lasso@queensu.ca</a>> wrote:<br>
><br>
> > Andras, you used to see similar errors with cmake when it was configuring, so I have to ask, have you seen vtkWrapPython itself fail this way?<br>
><br>
><br>
><br>
> I haven’t seen such an issue in the last couple of years.<br>
><br>
><br>
><br>
> We are building 3D Slicer every night on several computers from scratch. It includes full VTK (few-week-old master) and many VTK-based Python-wrapped classes. We use Windows10, VS2015 (or VS2017 with VS2015 toolset). We use Visual Studio generator, don’t
use Ninja.<br>
><br>
><br>
><br>
> Andras<br>
><br>
><br>
><br>
> From: David Gobbi <<a href="mailto:david.gobbi@gmail.com" target="_blank">david.gobbi@gmail.com</a>><br>
> Sent: Wednesday, September 26, 2018 10:48 AM<br>
> To: Brad King <<a href="mailto:brad.king@kitware.com" target="_blank">brad.king@kitware.com</a>><br>
> Cc: Andras Lasso <<a href="mailto:lasso@queensu.ca" target="_blank">lasso@queensu.ca</a>>; Andrew Maclean <<a href="mailto:andrew.amaclean@gmail.com" target="_blank">andrew.amaclean@gmail.com</a>>; VTK Developers <<a href="mailto:vtk-developers@vtk.org" target="_blank">vtk-developers@vtk.org</a>><br>
> Subject: Re: [vtk-developers] Python Wrapping fails in master build.<br>
><br>
><br>
><br>
> On Wed, Sep 26, 2018 at 8:03 AM Brad King <<a href="mailto:brad.king@kitware.com" target="_blank">brad.king@kitware.com</a>> wrote:<br>
><br>
> One could instead write to a temporary/random file name and then<br>
> rename when finished. CMake generates most of its files that way.<br>
><br>
><br>
><br>
> Thanks for the advice (and for taking the time to read this thread.) This may<br>
><br>
> be the ultimate solution, though I still want to do some digging to see what<br>
><br>
> what magic cl.exe itself uses to avoid this AV interference.<br>
><br>
><br>
><br>
> For now, though, I'll put together a patch that prints the value of errno when<br>
><br>
> fopen() fails. I'll probably print the result of GetLastError() too, since this is<br>
><br>
> a Windows issue. Hopefully Andrew will be able to see those and report on<br>
><br>
> them.<br>
><br>
><br>
><br>
> Andras, you used to see similar errors with cmake when it was configuring,<br>
><br>
> so I have to ask, have you seen vtkWrapPython itself fail this way? I'm still<br>
><br>
> trying to get a feel for how widespread this issue is.<br>
><br>
><br>
><br>
> - David<br>
><br>
> _______________________________________________<br>
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___________________________________________<br>
Andrew J. P. Maclean<br>
<br>
___________________________________________</div>
_______________________________________________<br>
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