Signal Probe - Source node does not exist - Signal Probe - Source node does not exist I've compiled my project. I've reserved an available pin for Signal Probe output. When I try to Add Signal Probe Pin, the selected node is not found. I see an error: Source node does not exist. Please specify a valid nod. I know the node exists since I can analyze it's behavior in Signal Tap. The node is inside the Remote Update IP Core. Replies: Re: Signal Probe - Source node does not exist I changed node filter to post fitting and was able to select the target node. The design compiled and the node was accessible at the selected pin. Thanks for the advice. Replies: Re: Signal Probe - Source node does not exist Hi, You may also try confirming whether that node exists or not by click View > Node Finder, and filter by Signal Tap: post-fitting to view the nodes you can route. Check this link https://www.intel.com/content/www/us/en/docs/programmable/683819/23-3/step-2-assign-nodes-to-pins.html Thanks, Best Regards, Sheng Replies: Re: Signal Probe - Source node does not exist The signal probably got optimized away or renamed. You were able to tap it in Signal Tap because you can tap pre-synthesis nodes. Signal Probe only can connect to post-fit nodes, so they must "survive" the compilation process. Either that or because it's a signal inside an IP, which sometimes can prevent post-fit access. When you use the Node Finder to find the signal, are you using the Signal Probe filter?