EWO DLL problem

[martin.jelemensky]

Dear all,

we in work are facing with a problem which is were to place the dll (external sdk for video control) for the ewo module. We have placed the corresponding dll-s into a folder on our disk and have set the path (system enviroments) to this path so that the dll-s are visible. However, as we found out this procedure was not successful and when EWO starts in our scada project (wincc oa 3.14 winx64) the ewo cannot see the dll-s and we got the following error message:

WCCOAui (1), 2018.11.30 23:41:06.811, SYS, WARNING, 133, Could not load shared library E:\\ConductPlus\\PVSS\\cp_liantang\\bin\\widgets/cctvEwo.ewo, The specified module could not be found.
WCCOAui (1), 2018.11.30 23:41:06.811, SYS, WARNING, 36/uim, The EWO "E:\\ConductPlus\\PVSS\\cp_liantang\\bin\\widgets/cctvEwo.ewo" is version "1", but we can only load version "4"

In the second step we have put the dll-s into the wincc oa installation folder into the subfolder "bin\\" and after this step ewo was able to use the dll-s.
The question i have is that it is necessary to setup something more then the enviroment path in windows to see the dll-s or also something inside the wincc oa ?

Thank you.

[acx.lilienthal]

Hi,

as I know you have to place the DLLs always in the BIN directory of the WinCC OA installation - there is no other way to get it working.
Starting with 3.16 it's either possible to place the DLLs into the BIN directory of your WinCC OA project.

Regards,
Benjamin Lilienthal