Hi, I have a problem with differential tracks. I created an impedance profile for 100 ohm differential and set a rule to use it.
![](https://s3.amazonaws.com/AltiumEcosys1-1/ALU_Apps/forum/attachments/791709/description/f3736ba444e64f4fa02dc9aa47bbf2b5.png)
But in the DRC I always have this error:
Differential Pairs Routing: Between Net TR0_P And Net TR0_N [Uncoupled Length = 28.946mm], [Maximum Uncoupled Length = 12.7mm]
Differential Pairs Routing: Between Net TR1_P And Net TR1_N [Uncoupled Length = 31.047mm], [Maximum Uncoupled Length = 12.7mm]
Differential Pairs Routing: Between Net TR2_P And Net TR2_N [Uncoupled Length = 29.227mm], [Maximum Uncoupled Length = 12.7mm]
Differential Pairs Routing: Between Net TR3_P And Net TR3_N [Uncoupled Length = 28.73mm], [Maximum Uncoupled Length = 12.7mm]
These are the tracks I'm talking about, how can I fix?
![](https://s3.amazonaws.com/AltiumEcosys1-1/ALU_Apps/forum/attachments/791709/description/e5a2d240191f4024850a05fb8fa6bb55.png)
These traces are all about 30 mm long; therefore, Altium is saying that there is an Uncoupled Length for practically the entire length of the track.
Can anyone help me?
Thanks in advance