Symbol editor: "This position is already occupied in unit 4"

Schematic Library Symbols
1

A slightly long story: sorry.

I have an open source project that I am trying to modify. There is a large FPGA that is drawn as units A…F
Some pins in unit F are off grid. When I move the pin onto a gridline, I get a popup that says:
Confirmation (title of window) with text of "“This position already occupied in unit 4”

What does this mean?

  1. The “unit 4” notation is odd as the units are letters: A, B, C
    2.Is there some relationship between Units? The pin name and number are unique.
  2. It implies a physical collision of pins within the symbol, which makes no sense. I moved the entire symbol within the editor and that doesn’t help.

A search of this forum for “position is already occupied” did not return any results, so I’m thinking this is obscure.

Barry

2

Unit 4 sound like unit D.

What’s the fpga’s exact name?

3

It is a custom symbol

4

Since it is an open source project just throw the exported ‘symbol.lib’ file in here. We can take it from there.

Otherwise there is hardly any way to guess. I for one never came across such error message.

5

There are a few inconsistencies in the way multi-unit parts are referenced. One of them is some number them and some letter them. I’ve reported bugs on the ones I’ve come across and I suggest you do the same.

6

It is not a bug at all.

The exact message actually is --> “This position is already occupied by another pin, in unit 4.”

In the symbol editor under ‘Edit | Library Symbol Properties’ check ‘All units are not interchangeable’ which in your case they are quite likely not. If they are, then you simply move that pin to a different location.

2 Likes
7

YES!
I’d forgotten about this option.

Thank you!
Barry

8

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