I am working on audio preamplifier project using [Altium Designer][1], which is also a great opportunity to learn this particular piece of software. Now, I've selected [Hierarchical design][2] to be able to get benefits of [Multi-Sheet and Multi-Channel Design][2]:

[![Project Options][3]][3]

Now, I have **8 audio relays**, implemented with `Repeat(AUDIO_INPUT_RELAY,1,8)


Command:

[![Audio Input Relays][4]][4]

and here is **Audio Input Relay Schematic itself**:

[![Audio Input Relay Schematic][5]][5]

Now, these **8 audio input relays** converge into single `SELECTED_AUDIO_OUTPUT_LEFT` and single `SELECTED_AUDIO_OUTPUT_RIGHT` lines and here is whole subsheet:

[![Audio Inputs Relays System][6]][6]

I am aware a volume control is missing (the project is not finished), however, this is not topic now and my question is: when I compile this project, why do I get following error (I am aware I can disable error reporting in Project Options, which is also not the point here, I want to know what did I wrong):

    Net SELECTED_AUDIO_OUTPUT_LEFT contains multiple Output Sheet Entrys (Sheet Entry AUDIO_INPUT_RELAY1-SELECTED_AUDIO_OUTPUT_LEFT(Output),Sheet Entry AUDIO_INPUT_RELAY2-SELECTED_AUDIO_OUTPUT_LEFT(Output),Sheet Entry AUDIO_INPUT_RELAY3-SELECTED_AUDIO_OUTPUT_LEFT(Output),Sheet Entry AUDIO_INPUT_RELAY4-SELECTED_AUDIO_OUTPUT_LEFT(Output),Sheet Entry AUDIO_INPUT_RELAY5-SELECTED_AUDIO_OUTPUT_LEFT(Output),Sheet Entry AUDIO_INPUT_RELAY6-SELECTED_AUDIO_OUTPUT_LEFT(Output),Sheet Entry AUDIO_INPUT_RELAY7-SELECTED_AUDIO_OUTPUT_LEFT(Output),Sheet Entry AUDIO_INPUT_RELAY8-SELECTED_AUDIO_OUTPUT_LEFT(Output))

and screenshot of error:

[![Compile Error][7]][7]

  [1]: https://www.altium.com/altium-designer/
  [2]: https://www.altium.com/documentation/1.1/display/NEXUS/((Multi-Sheet+and+Multi-Channel+Design))_AD
  [3]: https://i.sstatic.net/I7tYW.png
  [4]: https://i.sstatic.net/jUas8.png
  [5]: https://i.sstatic.net/S9Eot.png
  [6]: https://i.sstatic.net/2S6Gb.png
  [7]: https://i.sstatic.net/lRPom.png