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Date:	Wed, 12 Jul 2017 16:48:13 +0200 (CEST)
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To:	"Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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From:	gedau AT igor2 DOT repo DOT hu
Subject:	Re: [geda-user] PCB, load element bug (know then but not why)
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Hello Nicklas,

On Tue, 11 Jul 2017, Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:

> On Tue, 11 Jul 2017 05:16:15 +0200 (CEST)
> gedau AT igor2 DOT repo DOT hu wrote:
>
>>
>>
>> On Tue, 11 Jul 2017, Kai-Martin Knaak wrote:
>>
>>> "Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via
>>> geda-user AT delorie DOT com]" <geda-user AT delorie DOT com> schrieb am 11. July 2017:
>>>
>>>>
>>>> I discovered then adding a via at the first line I could use load
>>>> element to buffer. It seems a little bit and the problem is the same
>>>> in both pcb and pcb-rnd. Anybode have a clue?
>>>
>> <snip>
>>
>>> Can you give the contents of the footprint.fp file? Maybe the *.pcb file
>>> you derived the footprint from, too?
>>
>> I second this. Please share the offending (failing) .fp file and the
>> one you manually fixed.
>>
>> Regards,
>>
>> Igor2
>
> Attached. I used save buffer elemnts to file. Neither load layout or element to buffer worked. Adding a via at the first line and it could be loaded with load element to buffer but not load layout to buffer.
>
> I happened to have an old file that worked and then checking content of this in editor I found vias in the beginning of file and was very suprised then file could be loaded then one of these where added at the first line.
>
> I am pretty sure I used it before without problems before but can't remember the details. Could it be wrong parser is selected somewhere? File ending *.pcb

Thank you.

The problem is unfortunatley more complex.

The .fp format is a single Element[] or Element() block in a file. The 
.pcb format is a set of different objects, possibly Elements too, and some 
headers (like PCB[]).

A .pcb file will contain layer infromation too, an .fp file won't.

The file you attached is neither of the above:

- it contains two elements, so that it can't be a footprint file

- it also contains (some) layer info, so it can't be a footprint file

- but it does not contain the necessary headers to make it a valid .pcb 
file


It is a known bug in pcb-rnd, probably also in mainline: if you save a 
buffer with more than 1 elements, it will be hard or impossible to load it 
again. Saving only 1 element as buffer and you will be able to load it.

I don't plan to fix this in pcb-rnd, as elements will be removed soon. I 
will make saving the buffer as buffer and saving a single subcircuit as a 
footprint more explicit on the UI.

Regards,

Igor2

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