Probably Sjors can provide some simple explanation for this.
But as a general statement, I am involved in some discussions about the mrc "standard" and am trying to document known issues and known variants. I also have the beginnings of a tool that might say "warning: field XX of the header is non-standard, and may cause problems".
To that end, I would be happy to have a look at your files, and try to analyse the problem. Email me offline if you are interested.
Cheers
Martyn
*
* Dr. Martyn Winn
* STFC Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, U.K.
* Tel: +44 1925 603455 (DL) or +44 1235 567865 (RcaH)
* E-mail: [log in to unmask] Skype: martyn.winn
*
> -----Original Message-----
> From: Collaborative Computational Project in Electron cryo-Microscopy
> [mailto:[log in to unmask]] On Behalf Of Pierre-Damien COUREUX
> Sent: 11 April 2013 15:26
> To: [log in to unmask]
> Subject: [ccpem] mrc files and Chimera
>
> Hello everyone
> I'm running the 3d classification in Relion 1.1 I can't directly open
> the mrc output files from each cycle with Chimera, I always need to
> convert them to spider format for example to be able to open them in
> Chimera I'm using Chimera 1.7 (I also tried with version 1.6.2 without
> any success) Any ideas ?
> Thanks in advance for your help
> Pierre-Damien
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