Fusion won't recognize differential pairs

[amchoi]

 

 

I am trying to create differential pairs for the PCA9615 IC. I have named the two differential pair outputs as the following (see screenshot): DSDA_P, DSDA_M,DSCL_P, DSCL_M.

However, in PCB board design, I get an error ("The design has no differential pair signals") upon clicking the differential routing tool.

Does anyone know why Fusion won't recognize the net signals as differential pairs?

[yqliu · Accepted solution]

@amchoi , please try to name them as DSDA_P and DSDA_N.