 Hi, this is Dr. Don. Sometimes when you return to Posit Cloud after taking a break, for example, and you open up your workspace again, you may be in the middle of a worksheet, kind of like I am here. And it's tempting just to go ahead and click on the Run Chunk button, Run Current Chunk button, a little triangle there. Click on that, and you can see it generates an error. Get this red bar on the side that tells me the error is there somewhere, but here's the error message. And the thing I like to do is scan toward the end, and there is the key information. This could not find function the pipe operator. So what it's telling you is it's starting to run these lines of codes, and it gets to that pipe operator, and he doesn't know what that means. That should be a clue, as you get more experience here, that there needs to be a package loaded that contains that particular function. Now in our worksheet, usually at the very top of the worksheet, we have a code chunk that loads all the required packages for that particular exercise. And so you should get an habit of running all these chunks in sequence. But if you're coming back in that break, and you've restarted, and you've forgotten about that, sometimes Posit Cloud will unload packages while you are disconnected. So one thing you can do to clear this up is to click on the Run All Chunks Above button, and just click on that, and it runs all those preceding chunks. So this time, I'm going to close out that error, and I'm going to run this second chunk again. And you see this time, we didn't get an error message, and we've got our uinvotes data object that we created shows up over here in the environment. So remember that, you know, always if you're starting back in the middle of a worksheet, use the Run All Chunks Above button to make sure everything you need in that particular worksheet has been loaded. Hope this helps.