Forum Discussion
Occasional ContributorSignal 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.
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.
3 Replies
sstrellSuper Contributor
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?
ShengN_alteraHi,
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
- tedh4ddv
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.
