I have very (very) limited experience with Postman, but in my new job, I find I need to run a simple collection with a couple of values. However, when I tried running a collection with a CSV file with the values it reported:
Error: runtime:extensions~request: request url is empty
Thinking I didn’t understand how running collections works, I followed the steps in the following doc:
The results, however, were the same, i.e. request url is empty.
What is missing from the documentation that stops this feature from working properly?
Hey @descent-module-geo27 
Are all the request tabs saved? Or do you still have unsaved changes in the requests?
If you have changed the requests to use say, {{url}} which is reading the value from a file, where previously it was hardcoded. If the request is unsaved, the collection runner wouldn’t pick up that new edited value.
I haven’t seen you’re app window so this is just a guess but that’s the likely cause as you mentioned using the runner.
You could also enable the Autosave feature in the settings to help mitigate this from happening.
Spot on, @danny-dainton. It was as simple as hitting save for the URL.
As they say, a little bit of knowledge is a dangerous thing, but at least I’ve learnt something new today so hopefully, I’m not as “dangerous” as I was. 
Thanks very much for the prompt help. Appreciate it.
