Web client

[MassEffect]

Hello,
there is a system with installed WinCC OA 3.16.
WinCC OA uses control manager with web_client_http.ctl on server project.
Recently I had to change OS user's name on computers (server and clients) with the WinCC OA (admin user's name A was changed to admin user's name B),
after that actions, I cannot run the project WinCC OA using any brouser (IE, Chrome as example) on a client computer, I can see an endless attemption to conect the server project only.
User's folder name on the system disk I managed to change to the new user's name and also changed the "ProfileImagePath" parametr in the windows registry but my problem cannot disappear.
Maybe somebody knows a way to solve this problem?

[kilianvp]

Sounds like a firewall issue

[MassEffect]

Firewall is off on both server and client machine.
Maybe problem is in some cache stored with the old user name

[MassEffect]

An extra information of the problem:
I can see small square window located in the centre of brouser and the caption of this small window reads "WinCC OA ULC UX 3.16" with an arrow cycling around itself with above the notice "Initializing server connection"

[gschijndel]

I guess nobody has a working crystal ball, so with the limited information we got we can only guess the cause of the problem.
My guess would be that something more has changed then just changing the users name. Perhaps the host name of the server has changed and the config file still contains the old name.

Best would be to check the log files of the (web)server and post them here if the cause is still unclear.

[MassEffect]

Best would be to check the log files of the (web)server and post them here if the cause is still unclear.

Can you tell me what a log file I have to check?
The log file of the control manager that running the script "webclient_http.ctl" is empty.

[leoknipp]

In the WinCC OA server you can activate the debug flag "-dbg http" for the CTRL manager running the script webclient_http.ctl.
With the log output you can check if the server gets any data when the client tries to connect. If no data is received the problem is not related to WinCC OA.

Best Regards
Leopold Knipp
Senior Support Specialist

[gschijndel]

Can you tell me what a log file I have to check?
The log file of the control manager that running the script "webclient_http.ctl" is empty.

Without debugging active most managers will only write information into the PVSS_II log file. So that is always a good place to start looking for errors, warnings, etc.

[MassEffect]

The log file contains:

httpAccess:WCCOActrl (4), 2022.03.20 17:19:28.728 incoming connection on secured port; IP =::ffff:10.106.7.14
httpAccess:WCCOActrl (4), 2022.03.20 17:19:28.728 incoming connection on secured port; IP =::ffff:10.106.7.14
httpAccess:WCCOActrl (4), 2022.03.20 17:19:28.744 incoming connection on secured port; IP =::ffff:10.106.7.14
httpAccess:WCCOActrl (4), 2022.03.20 17:19:28.744 incoming connection on secured port; IP =::ffff:10.106.7.14
httpAccess:WCCOActrl (4), 2022.03.20 17:19:28.744 incoming connection on secured port; IP =::ffff:10.106.7.14
httpAccess:WCCOActrl (4), 2022.03.20 17:19:28.744 incoming connection on secured port; IP =::ffff:10.106.7.14
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:28.728, HTTP, new incoming connection on secured port; fd = 596; IP = "::ffff:10.106.7.14"
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:28.728, HTTP, new incoming connection on secured port; fd = 660; IP = "::ffff:10.106.7.14"
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:28.728, HTTP, new incoming connection on secured port; fd = 712; IP = "::ffff:10.106.7.14"
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:28.744, HTTP, new incoming connection on secured port; fd = 756; IP = "::ffff:10.106.7.14"
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:28.744, HTTP, new incoming connection on secured port; fd = 760; IP = "::ffff:10.106.7.14"
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:28.744, HTTP, new incoming connection on secured port; fd = 764; IP = "::ffff:10.106.7.14"
httpAccess:WCCOActrl (4), 2022.03.20 17:19:29.275 incoming connection on secured port; IP =::ffff:10.106.7.14
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:29.275, HTTP, new incoming connection on secured port; fd = 752; IP = "::ffff:10.106.7.14"
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:39.167, HTTP, reading data from fd = 596
WCCOActrl4:HTTP:closing connection with fd = 596 at idx 0
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:39.167, HTTP, reading data from fd = 660
WCCOActrl4:HTTP:closing connection with fd = 660 at idx 1
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:39.167, HTTP, reading data from fd = 712
WCCOActrl4:HTTP:closing connection with fd = 712 at idx 2
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:39.183, HTTP, reading data from fd = 764
WCCOActrl4:HTTP:closing connection with fd = 764 at idx 5
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:39.183, HTTP, reading data from fd = 756
WCCOActrl4:HTTP:closing connection with fd = 756 at idx 3
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:39.183, HTTP, reading data from fd = 760
WCCOActrl4:HTTP:closing connection with fd = 760 at idx 4
httpAccess:WCCOActrl (4), 2022.03.20 17:19:39.698 incoming connection on secured port; IP =::ffff:10.106.7.14
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:39.698, HTTP, reading data from fd = 752
WCCOActrl4:HTTP:closing connection with fd = 752 at idx 6
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:39.698, HTTP, new incoming connection on secured port; fd = 752; IP = "::ffff:10.106.7.14"
WCCOActrl4:WCCOActrl (4), 2022.03.20 17:19:39.714, HTTP, reading data from fd = 752
WCCOActrl4:HTTP:closing connection with fd = 752 at idx 0

that is opening-closing connection continuously
Also in the brouser developing tool I can see that the connection has aborted when brouser tried to read url "/UI_LoadBalance?0.8846598"

[MassEffect]

When I disabled the service "Remoute access" and wrote in config file:
LoadBalance = "servA"
LoadBalance = "servB"
I managed to run the web client on server's computer (IE brouser), I could not do it on server machine before, but I still cannot run the web client on other machine brouser.
I have 1006 error number (websocket error?).