Timequest clock reference

Thanks for hint.

I finally got a breakthrough 1 hour ago:

It is actually very simple, properly so simple you did not realize what I was trying to do.

Instead of using

create_clock -name {CLK_80M} -period 12.500 -waveform { 0.000 6.250 } [get_ports {CLK_80M}]

I should forget about the pin and make a base clock directly on the post synthesized global net as pre-synthesized signal name is interpreted as the pin)

create_clock -name {CLK_80M_INTERNAL} -period 12.500 -waveform { 0.000 6.250 } [get_pins {CLK_80M~clkctrl|outclk}]

nb For other beginners I can add that in Timequest a pin is not a pin. A pin is called a port and a pins means an input or output of an internal FPGA primitive.

Case closed