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tedh4ddv's avatar
tedh4ddv
Icon for Occasional Contributor rankOccasional Contributor
2 years ago
Solved

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. P...
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  • tedh4ddv's avatar
    tedh4ddv
    2 years ago

    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.

sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
2 years ago

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?