Magic number

[FarzaneJP]

comments from Erik Lindahl on this error:

Magic number error in xtc file

The header of each XTC frame contains this number to designate it as an XTC frame. For whatever reason, your file has completely different data there. If this happens half-way through the file, you can still rescue the earlier parts by reading and then writing to another file. Unfortunately this means your file (i.e., disk storage) is corrupted in a major way. This can be due to a number of reasons, all of which are not part of GROMACS (Bad disk, bad controller, corrupted file system, multiple …