Unable to load ecan YARP device on Windows

[traversaro]

Describe the bug
The ecan plugin installed by the ICUB option ENABLE_icubmod_ecan does not work correctly, and it is not shown correctly by the yarpdev --list on Windows.

To Reproduce
Install ICUB and enable the usbCamera device. Then, run yarpdev --list, you get:

2020-11-19T17:00:54.3549673Z [ERROR] |yarp.os.YarpPluginSettings| Error while opening C:/robotology/robotology/lib/iCub/esdCan.dll:
2020-11-19T17:00:54.3551267Z   The specified module could not be found.
2020-11-19T17:00:54.3551959Z 
2020-11-19T17:00:54.3552366Z 

Expected behavior
I would expect yarpdev --list to work correctly as it does for all the other YARP devices installed by ICUB.

Configuration (please complete the following information):

• OS: Windows 10
• ICUB version: both master, devel and 1.17.0 release
• compiler: Visual Studio 2019

Additional context
I discovered this in https://github.com/robotology/robotology-superbuild/pull/521/checks?check_run_id=1425069998 .

Similar issues:

• Unable to load the yarp devices built by wearables in Windows wearables#91
• usbCameraRaw YARP device is not installed correctly in Linux yarp#2414

[randaz81]

My first question is: is both the SDK and the windows device driver (.dll) correctly installed?
The message Error while opening C:/robotology/robotology/lib/iCub/esdCan.dll may be misleading, because the file may exists, but I think that esdCan.dll will probably try open internally the dll of the device driver, which needs to be in the system path or in C:\Windows\System32 or equivalent.

[traversaro]

The windows device driver is installed and on the path, on the other hand the SDK for sure is not installed in the CI, I can try on my PC where the device is installed to check if it works.