"bidirection to out" error

[zhao.bruce]

Hi, I think bidirection means  "input and output", so I connected the ADC's out pin to MC74AC245DW's input. then use "electical rules check", there are 8 errors.

ERC [Circuit1]  <2009-07-08 11:34:41>
    Error: Connecting 'Bidirectional to Out';   [U3 pin 9, Circuit1]  to  [A1 pin D7, Circuit1]
    Error: Connecting 'Bidirectional to Out';   [U3 pin 2, Circuit1]  to  [A1 pin D0, Circuit1]
    Error: Connecting 'Bidirectional to Out';   [U3 pin 3, Circuit1]  to  [A1 pin D1, Circuit1]
    Error: Connecting 'Bidirectional to Out';   [U3 pin 4, Circuit1]  to  [A1 pin D2, Circuit1]
    Error: Connecting 'Bidirectional to Out';   [U3 pin 5, Circuit1]  to  [A1 pin D3, Circuit1]
    Error: Connecting 'Bidirectional to Out';   [U3 pin 6, Circuit1]  to  [A1 pin D4, Circuit1]
    Error: Connecting 'Bidirectional to Out';   [U3 pin 7, Circuit1]  to  [A1 pin D5, Circuit1]
    Error: Connecting 'Bidirectional to Out';   [U3 pin 8, Circuit1]  to  [A1 pin D6, Circuit1]
ERC [Circuit1] completed;  8 error(s), 0 warning(s);  Time: 0:00.05

I want to know Why ?

[NatashaB · Accepted solution]

ERC rules are customizable to suit your preferences.  You can specify whether particular connection types are valid or invalid (and whether they should throw warnings or errors).  To customize the ERC Rules:

1. Navigate to Tools -> Electrical Rules Check
2. In the ERC rules tab, click on the Bi/Out box to toggle between Error/Warning levels

This should solve the issue.

[zhao.bruce]

Thanks for your reply immediately ! I tried that is ok !