Cannot find output terms for clock tree synthesis in SOC Encounter 10.1

[sudeep_]

Hi,

I am getting an error while doing clock tree synthesis in encounter 10.1. It showing that
**ERROR: (ENCCK-158): Cannot find output terms for clock clk_in/ANAIO.

Here pad inastant name is "clk_in" and pin name is "ANAIO".


CLock tree specifile started like

AutoCTSRootPin clk_in/ANAIO
NoGating rising #(for auto CTS on a net)
Buffer HS65_LS_BFX2 HS65_LS_BFX4 HS65_LS_BFX7 HS65_LS_IVX2 // name of buffer used for CTS
MaxDelay 5ns
MinDelay 0ns
MaxSkew 50ps
End