When using mtline model in cadence spectre schematic simulation, why I
can not connect output of one mtline to output of another mtline?
(warnings show there will be short circuit and floating nodes)
This vaguely rings a bell.
Where is the warning appearing, and what exactly is the message you see?
Which IC and MMSIM version are you using? (the spectre version will appear in the spectre log file at the top, and the IC version can be found by using Help->About in the CIW, or by typing getVersion(t) in the CIW).