Gmx trjconv

GROMACS version:2020.1
GROMACS modification: No
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error google forum
when, I tried convert trajectory of molecular dynamics simulation of my protien it shows,
Fatal Error:
Magic Number Error in XTC file (read 0,should be 1995)
so,my first question is this a version problem?
next question - how to solve it?
and the protien is a side during simulation some times out of box?

here you can post to similar questions and understand more on your error
One can get such a error when the xtc is corrupt (for example)
Kind regards