ID:16561 The Signal Tap Logic Analyzer instance "<instance>" can't tap node "<bus_name>" because it is a bus. The Signal Tap Logic Analyzer only taps individual nodes. Remove the bus node and add each bit of the bus separately and then try to tap the node again.
CAUSE: You attempted to tap a bus node as a single wire.
ACTION: In the Signal Tap Logic Analyzer, on the Setup Tab, remove the bus node and add each bit of the bus separately and then try to tap the node again.