# ERC issues

**URL:** <https://librepcb.discourse.group/t/erc-issues/571>\
**Category:** Help\
**Created:** [August 26, 2023, 11:40am UTC](https://librepcb.discourse.group/t/erc-issues/571 "2023-08-26T11:40:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![4Springs](https://avatars.discourse-cdn.com/v4/letter/4/ee59a6/32.png) [@4Springs](https://librepcb.discourse.group/u/4Springs)\
**Post date:** [August 26, 2023, 11:40am UTC](https://librepcb.discourse.group/t/erc-issues/571/1 "2023-08-26T11:40:18Z")

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I figured this out, but it took me a while. Here are the steps I took, which may be informative for the next version:

I’m trying out the ‘Order PCB’ function. The first thing it shows me is a box talking about ‘Electrical Rule Check’ warnings:

 ![image](https://global.discourse-cdn.com/free1/uploads/librepcb1/original/1X/2f43ebe977df805a86dcd9e619889870dfff5f6b.png)  
The net numbers are very hard to find in my circuit! Is there a way to search? I went all over my PCB looking at the tiny numbers on the board, and eventually found them. But I couldn’t see any problems in the PCB editor.  
So I looked at the Schematic Editor, and couldn’t even see the net numbers there. I tried looking for the properties of a wire, but that doesn’t work. So I found the net numbers on the PCB, and correlated them with the wires on the Schematic. And I found a problem on the schematic - there were some wires that were not connected, and were covered up by other wires. I fixed these, re-ran the function and it all worked.

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**Author:** ![ubruhin](https://avatars.discourse-cdn.com/v4/letter/u/c89c15/32.png) [@ubruhin](https://librepcb.discourse.group/u/ubruhin)\
**Post date:** [August 26, 2023, 12:01pm UTC](https://librepcb.discourse.group/t/erc-issues/571/2 "2023-08-26T12:01:03Z")

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Thanks for your feedback! You’re totally right, this kind of warning is very hard to locate. There’s already an issue open for that:

> <https://github.com/LibrePCB/LibrePCB/issues/553>
>
> \##### SUMMARY
> !\[image\](https://user-images.githubusercontent.com/7809481/670809…23-7e6d6e00-f196-11e9-9c4a-80dbf1983714.png)
> 
> When you have errors, it is difficult to know where is located the problem in the different pages of schematics (here, the problem is caused by a problem with forced nets and occurs not just after having placed the item, but later, and in many places (the problem seems to be spread)).
> 
> \##### SOLUTION
> a 'goto' function that switch to the good page, center the element and if possible highlight it.
> (but the first two will already be a good improvement).
> 
> If not possible or too hard, just tell the page and coordinates.

Some notes:

- These ERC warnings are also shown in the schematic editor (in the ERC dock), where some more context is provided than on the “Order PCB” website.
- ERC warns about issues in the schematic, DRC warns about issues in the board. With this in mind, at least you know in which editor to look for the issue.
- Automatic net names (those starting with “N”) are not directly visible in the schematic editor, but they are shown as tooltip when hovering with the cursor over a wire.

But of course it is planned to implement a “go to problem” function in the ERC dock to make this much easier.

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<div class="post-metadata">

**Author:** ![4Springs](https://avatars.discourse-cdn.com/v4/letter/4/ee59a6/32.png) [@4Springs](https://librepcb.discourse.group/u/4Springs)\
**Post date:** [August 28, 2023, 10:36am UTC](https://librepcb.discourse.group/t/erc-issues/571/3 "2023-08-28T10:36:25Z")

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Aha!  
I spent a fair amount of time looking for ERC in the menus etc. But I guess I didn’t look in the ‘Go to Dock’ section of the menu.  
I did look in the help (Quickstart Tutorial), but there doesn’t seem to be a search tool.
