Has anyone else had trouble with neverblue and cpv lab? Even when I direct link when I test the link it says my values are wrong and gives me an error page.
I was confused about that for a while also. It's okay, if you grab your test link and copy & paste it in a browser's address bar, you'll find that it works, so it'll work with your ads as well
I think that NB has a variable called "&test=" that can be used in their links specifically for testing links without recording the clicks. This variable only works if there's a numeric value attached to it. I'm guessing that CPVlab appends a string as opposed to only a number. If you ask your AM at NB you'll get an exact answer.
This is also why you have to append "&subid=" to the end of your NB link in CPVlab. Otherwise, CPVlab will append their unique tracking ID (which looks something like "vtbr72mh_33_53360") at the end of the "c" variable in your link. CPVlab will just append it at the end of your link... so if your NB link ends with something like "&c=458122" (which is the creative number), CPVlab will send back "&c=458122vtbr72mh_33_53360" which isn't compatible with NB's system.
In this case, it will say, "The parameter "c" must be numeric"
However, if you add "&subid=" to your NB link in CPVlab, it will send back "&subid=vtbr72mh_33_53360", which is correct.
Hope that helps. If I'm wrong about any of that, please correct me 
That is exactly what I was looking for. Thank you!
No problem!