Error loading object from URL : subreport:testsubreport

Hey, just wondering if this is a known issue and no one's responded because I did something stupid in setting it up? I went back through the tutorial a few times, and this structure seems to work for other information, but the code in the guide for importing from a dataSink doesn't seem to work right. Also, since the issue is slightly different (it's not a load test report throwing a bad null pointer, it's a subreport that's empty now) is the ettiquette that I split the post or something?