Name: Davide Racco Date: 01/26/17-05:19:10 PM Z

Thanks very much, the point was indeed that I was wrongly imposing Dimension->4 to get a final numerical result.
I should then use PaXEvaluate[] in the manipulation of the result with Feyncalc, or leave the evaluation to LoopTools with some other command?

Best,
Davide