Extension package not working on Windows

[nicoleaucoin]

On Windows10 against the Slicer trunk built with vtk9 and qt5, I can build SlicerOpenIGTLink (master) and package it into a .zip file and use the extension manager to load the extension from file, but when I restart Slicer, it can't load the modules:

Error(s):
Cannot load library C:\Users\Nicole Aucoin\AppData\Roaming\NA-MIC\Extensions-860a61b\SlicerOpenIGTLink\lib\Slicer-4.9\qt-loadable-modules\qSlicerOpenIGTLinkIFModule.dll: The specified module could not be found.
Error(s):
Cannot load library C:\Users\Nicole Aucoin\AppData\Roaming\NA-MIC\Extensions-860a61b\SlicerOpenIGTLink\lib\Slicer-4.9\qt-loadable-modules\qSlicerOpenIGTLinkRemoteModule.dll: The specified module could not be found.
Error(s):
Cannot load library C:\Users\Nicole Aucoin\AppData\Roaming\NA-MIC\Extensions-860a61b\SlicerOpenIGTLink\lib\Slicer-4.9\qt-loadable-modules\qSlicerPlusRemoteModule.dll: The specified module could not be found.

The dependent library VP9 that was built didn't get installed with CPack, that might be part of the problem. From a build directory, I can start up Slicer with the additional launcher settings file that SlicerOpenIGTLink configures and it will load the modules correctly:

Slicer.exe --launcher-additional-settings c:\path\to\SlicerOpenIGTLink-build\inner-build\AdditionalLauncherSettings.ini

[nicoleaucoin]

FYI: when I add a print out at the top of CMake/SlicerBlockInstallVP9.cmake it looks like the check at the top isn't passed so the whole file is ignored:

-- SlicerblockInstallVP9: Slicer_USE_VP9 =  CMAKE_SYSTEM_NAME = Windows

[leochan2009]

Hi Nicole,
Now i remember, Vp9 library is static library and in the windows system it is not needed to install in run time, see the commit message in commit

[leochan2009]

which visual studio version are you using?

[nicoleaucoin]

Visual Studio Community 2015
Version 14.0.25431.01 Update 3

[nicoleaucoin]

VP9 being static makes sense for it not being installed, not sure what's missing from the extension dlls then, will try to dig in after launching a terminal with the Slicer environment set.

[leochan2009]

en, unfortunately i don't have windows machine now, so i can not help you.
@Sunderlandkyl , did you test the extension on your machine?

[Sunderlandkyl]

Just tried packaging it now.

The same thing happened, but I managed to fix it by copying the OpenIGTLink and OpenIGTLinkIO dlls
From - ./bin/
To - ./lib/lib/Slicer-4.9/qt-loadable-modules/

The python wrapped libraries are also in an odd location (./lib).

[leochan2009]

@Sunderlandkyl
en.... i remember we had this issue before and it was fixed .

[nicoleaucoin]

Verified that I can get my built version working by copying over those files.
Do you have an estimate of when you can fix the CMake commands for install/package for the OpenIGTLink and OpenIGTLinkIO modules so that the extension can be used on Windows? If I manage to figure it out, I'll submit a pull request but no luck so far.

[nicoleaucoin]

Slicer Preview windows build here:
http://slicer.cdash.org/viewFiles.php?buildid=1318855
has the incorrect locations of the supporting dlls.

Checking the linux package from here:
http://slicer.cdash.org/viewFiles.php?buildid=1318514
It uses lib/ and lib/igtl/ for the OpenIGTLink and LinkIO library files, not sure if that would run as an installed extension either.