the block design of ad9371

Hi,I want to get clk_1 from the IP of axi_ad9371_tx_clkgen.But as I do as follow steps,The tcl console present errors.

Then I validate design,the tcl console present errors as follow picture.

can't read "clk1_out": no such variable
ERROR: [BD 41-1273] Error running propagate TCL procedure: can't read "clk1_out": no such variable
::analog.com_user_axi_clkgen_1.0::propagate Line 41
can't read "clk1_out": no such variable
ERROR: [BD 41-1273] Error running propagate TCL procedure: can't read "clk1_out": no such variable
::analog.com_user_axi_clkgen_1.0::propagate Line 41
can't read "clk1_out": no such variable
ERROR: [BD 41-1273] Error running propagate TCL procedure: can't read "clk1_out": no such variable
::analog.com_user_axi_clkgen_1.0::propagate Line 41

Please tell me how can I get the clk_1's output. I will very apreciate it.