Question:

I am having problems reading mrc maps in EMAN. I have a ccp4 map which I convert to mrc using em2em. The map looks fine in chimera. when I am trying to use this file by lauching ssehunter3.py, the reading of the map is starting OK but then I got this error message:

Map Information

mean: -0.003090 sigma: 0.078643 threshold: 0.100000 dimensions:22,22,22

Warning: Incomplete data read 14/484 blocks

-12.0 12.0 Segmentation fault (core dumped)

I have also tried to convert with situs but without success. Is there any way I can get a ccp4 map converted to an mrc that is readable by eman?

Answer:

CCP4 maps should be directly readable by EMAN. You shouldn't need to convert anything. If you have a map EMAN won't read properly, please send us an example, and we will fix the problem.

The 'Incomplete data read' message you got on the converted image means something went wrong in the conversion process or the transfer process from one computer to another. Is the size of the file 22*22*22*4+1024 ?