STREAM::expression with special characters

I honestly don't know why the first parenthesis causes disruption for the logic. This way, sometimes I workaround using hexa chars like you did, and in some cases I just ignore that char using a dot. Plus, I prevent command substitution with {}:

set find {this\.initNewTransfer.t, n/),}
set replace "this.initNewTransfer(t, n), INJECTED-CODE,"

Just keep in mind the "find" is the regexp and "replace" a simple text.

Regards.

As I wrote, solution of this is:

set find "initNewTransfer\\x28t, n\\)"
set replace "this.initNewTransfer\x28t, n\), INJECTED-CODE"

The first bracked "(" is possible replace with \x28 or \050 (is the same char code with octal). But first bracket is not possible define with escape sequence (double backslash) like "\(", it is not working.

The second bracket ")" is possible define with hex or oct code, but also escape sequence is correct "\)".

I don't know if it's a feature or bug (I tested it with 15.1, 12.x and 13.1 sw version).