rexMatchp error when netlist

Hi,

I got the error in CIW when netlsit is created from maestro

*Error* rexMatchp: argument #2 should be either a string or a symbol (type template = "tS") - nil

This error will not block my simulation, but appears everytime netlist is created. 

I use ams simulatior in my test bench. 

My cadence version is ICADVM20.1-64b.500.30, MMSIM version is 21.1.0.664.isr16, Xcelium version is 22.03-s001. 

If anyone has clue about this error?

Thanks for your attention. 

BR