Thank you for your kind answer. It was a great help

Is there a way to access OPC values ​​when I get and run the project in wincc oa 3.12 version?

WCCILdata (0), 2020.09.04 14:02:12.531, PARAM,SEVERE, 112, Emergency mode active, DataManDpInternSup, enterEmergencyMode, Disc full, entering emergency mode. Please clean up disc and restart WinCC OA WCCILpmon (1), 2020.09.04 14:02:12.615, SYS, SEVERE, 1/pmon, Emergency Mode detected, changing to wa...

The symbol is using $-parameter. For example, symbols in use from $DP1 to $DP10, but if you enter only the values ​​from $DP1 to 5, a warning appears that there is no value from $DP6 to 10. -> Parameter incorrect, did not find the $-parameter,<- Since there are many symbols, it is difficult to enter...

The fileSelector() function has an argument that specifies the starting position, but no folderSelector()
How do you specify the starting position???

Solved.
I am using WINDOW 10.
I checked Control Panel -> Language Settings -> Use UTF-8

WARNING, 196, Illegal byte (0xB9) in UTF-8-encoded string, Codepoint::fromUtf8
As above, the message occurs repeatedly. How can I solve it?~

I am currently using WINCCOA version 3.12.

I understand that it is possible to connect to 3.16 DP from 3.12 client.

I'm curious about the compatibility in the UI part.
Based on panel
Can I run a project that is going back to 3.16 in 3.12?
Conversely, can I run version 3.12 as version 3.16?

Last time I left a question wondering where to get the list from Objects-> Widgets-> ActiveX I got the answer with -> The list of installed ActiveX elements is read from the operating system However, even if I delete the registry in Windows, the ACTIVEX list in WINCC OA still remains, so I ask again...

Thank you for your kind answer. It was very helpful