Hi Maurício,
I don’t have this problem opening your PDB file with ChimeraX 0.5 release (Dec 20, 2017) and also the current daily build.  I only get one warning message that can be ignored, that it does not like the END on line 2615, and the structure looks fine.  I’m testing on Mac.

I’m not sure what’s happening for you.  I guess you could make sure you are using a fairly recent version; otherwise, maybe it is something specific to your system or platform.
Elaine

> On Jan 25, 2018, at 10:05 AM, Maurício Menegatti Rigo <mauriciomr1985@gmail.com> wrote:
>
> Sure, this is my file.
>
>
> 2018-01-25 16:01 GMT-02:00 Elaine Meng <meng@cgl.ucsf.edu>:
> Dear Mauricio,
> It’s hard to tell without having the file, or at least part of it that gives these messages.  Could send as attachment to the list, or if private, just to me.
> Best,
> Elaine
> -----
> Elaine C. Meng, Ph.D.
> UCSF Chimera(X) team
> Department of Pharmaceutical Chemistry
> University of California, San Francisco
>
> > On Jan 25, 2018, at 8:55 AM, Maurício Menegatti Rigo <mauriciomr1985@gmail.com> wrote:
> >
> > I don't understand, my .pdb file seems perfectly fine, but I keep getting this error:
> >
> > Ignored bad PDB record found on line 1
> > ATOM 1 N ASN A 1 61.433 13.168 52.787 1.00 69.56 N
> >
> > Ignored bad PDB record found on line 2
> > ATOM 2 CA ASN A 1 62.543 13.695 51.962 1.00 69.56 C
> >
> > Ignored bad PDB record found on line 3
> > ATOM 3 C ASN A 1 61.990 14.337 50.735 1.00 69.56 C
> >
> > Ignored bad PDB record found on line 4
> > ATOM 4 O ASN A 1 60.999 13.878 50.167 1.00 69.56 O
> >
> > Ignored bad PDB record found on line 5
> > ATOM 5 CB ASN A 1 63.479 12.547 51.555 1.00 69.56 C
> >
> > 2610 messages similar to the above omitted
> >
> > I can open it in Chimera, PyMol, VMD, among others. But in ChimeraX is always the same error. I'm working on Linux (Ubuntu 14.04) with ChimeraX version 0.5 (2018-01-24).
> >
> > Any help?
> >
> > Thanks in advance,
> > Mauricio M Rigo, Ph.D
>
> <BEST_SiglecE_murine-BL00230001-chainA.pdb>