In reply to Ethan.

Thanks Ethan, and good for you on trying the code!

The SAS macro processor is trying to interpret the URL params that are set off with ampersands. These aren't macro vars though -- just part of the URL. So the WARNING is fine, no worries. The workaround to avoid the warning is to add wrap each ampersand in the URL with %nrstr(&). Makes the URL less readable, but SAS will stop trying to interpret those.