Custom Error Message (How to?)

Question

Hello,
I have a removeInstance tied to a button in the click event.  I know this will generate a default Adobe error if the minimum number of rows have been reached.
I would like to replace the default Adobe error of "index out of bounds" with a more user friendly error message.
I tried this after the removeInstance, but default error still popped-up:
xfa.host.messageBox("Delete error encountered.  Maximum number of rows deleted.", "Warning",1,0)
Can someone offer assistance?
Thanks

Answer 1

You cannot change the error massage but you can suppress it completely.
This script will check if the row "Row" currently occurs mor than 1 time, which is the minimum.
If so, the script to remove an instance is executed, otherwise your message is shown.
if (_Row.count > 1) {
     _Row.removeInstance(1);
} else {
     xfa.host.messageBox("Delete error encountered. Maximum number of rows deleted.", "Warning",1,0);