The problem is that we don't know what's inside of p_CreateExcel. The code creates what I suppose is a valid path with a file that includes the date. I'm not sure if you need to add quotes or if it's something else in the code of the procedure.
Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?
How to post data/code on a forum to get the best help: Option 1 / Option 2