$strrstr(x,y) Last Occurrence of String X in String Y

[mista_j]

@Florian

$strrstr(x,y) finds the last occurrence of string y in string x.

$Regexp(%BINC%,(.*)(/02/)(.*),$1++$2==$3)
This works very well as an identifier, but how can I edit
it properly so that it only adds a "=" after the last occurrence, I can then use that equal sign as a reference point to cut the full string from the right. Since I can already cut from the left to remove leading info using
$Cutleft(%BINC%,$sub($strstr(%BINC%,'/02/'),1))