At run time the application logs errors about the button to diagnostics under these circumstances:
If the Value connection is not assigned, when the operator presses the button the pop-up is not shown and the application logs an error.
If the terminal's resolution is too small to show the string pop-up keyboard or scratchpad, the pop-up is not shown and the application logs an error.
If the number of characters entered is greater than the maximum number allowed by the tag, when the operator presses Enter, the display turns red, the string is not sent to the Value connection and the application logs an error.
Create String Input Enable buttons
How the String Input Enable button works at run time
Causes of run-time errors for Enter key handshaking