Dear Antonello:
Re-read the docs:
You can specify more than one delimiter in the Path Parameter Delimiters field. For example, you have two business applications. In one business application, you want to use a semicolon as the delimiter. In another business application, you want to use a colon as the delimiter. You can specify both in the Path Parameter Delimiters field.
The first matching delimiter is used, and others are ignored.
So my read is you can set / and # as path parameter delimiters . But it hits the / and will then ignore the #
I am sure there is another case like this in the past .