I am working on a multi channel hierarchical design in Altium 19 and getting an error 'net has only one pin' for all signals contained in buses routed between two sheets.

Below is my top level schematic. I've circled the bus SENSE as an example to trace.

enter image description here

In the MCU sheet below, I connect the SENSE[1..17] port to a bus with label 'SENSE[1..17]', then break out individual signals in the bus to pins on the MCU.

enter image description here

In the Switches sheet, I have duplicated sheets for two different types of switches, and I group their SENSE nets together into one large bus going to a port as shown below. enter image description here

I've seen it suggested in other posts that net identifier scope set to 'global' will fix the issue, however I don't see why the error is occurring at all since I've followed the rules and used ports to make connections between sheets.

Below are the errors, for reference:

enter image description here

  • 2
    \$\begingroup\$ This question might be better directed to the Altium forums. \$\endgroup\$
    – The Photon
    Commented Oct 21, 2019 at 4:51
  • \$\begingroup\$ do you know Altium has an open forum ? \$\endgroup\$
    – Mitu Raj
    Commented Oct 21, 2019 at 10:22
  • \$\begingroup\$ Perhaps I am mistaken but I think you need to break out the bus into its individual nets using a "Bus Entry" for each signal. \$\endgroup\$
    – DerStrom8
    Commented Oct 22, 2019 at 10:26

1 Answer 1


You did repeat the sheets but not the sheet entries.

Repeat(COUT, 1,5)

By this you have the components from this sheet five times. When you name the Sheet entry SENSE the SENSE port of all five sheets are connected to the identical net (sometimes this is intended).

Leave the port name of the sub sheet named SENSE but on the sheet symbol with the repeat statement you need the call it REPEAT(SENSE). You need to name the net between the repeated sheet port and the bus with a net label called SENSE.

See Altium Doku and this Picture in chapter "Creating a Multi-Channel Design" Bus "Headphone[1,8]"


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