Contextual filters not allowing multiple values I'm using Drupal 7 and Views 7.x-3.8. I have a taxonomy term "A" which is related with another taxonomy term "B". I want to retrieve a list of "A", but filtered by those "B" that are present in the URL as query parameters. There can be more than one "B" in the URL.

So I've created a contextual filter with PHP code that finds all "B" IDs in the URL and ends up with something like: "return $B1+$B2+$B3...;". Of course, I've checked the Allow multiple values option.

If I pass only one value (e.g. return "15";), the query runs OK and it brings me all "A" related with the B with ID 15, but if I pass two or more values (e.g. return "15+20";), I get a No query was run message, and nothing in the view.

Is this bug for the Views module? I've also tried to replace the PHP code with a simple return "15+20"; in order to simplify the test case, but I get the same error.
I don't know if this would answer your questions, but I just noticed that, not only you need to check "Allow multiple values", you also need to specify "Term IDs separated by , or +" in the "Filter value type" select list.

(using Views 7.x-3.14 at the moment)