[gmx-users] XTC error

[hhhh huan]

Dear gmx developers and users.

I was trying to extend my simulation using tpbconv, and then mdrun. Unfortunately, my simulation crash in the half way. it stated there" XTC error". 
The command i used was: 

tpbconv -s p1.tpr -f p1.trr -e p1.edr -n p1.ndx -extend 5000 -until 10000 -o extend.tpr
 
Is there any wrong with it?
 After that, i try to redo again but it comes out with different error. It stated: 
Fatal error:
wrong string length 0 for string buf (source tpxio.c, line 1150)

Any suggestions will be appreciated.
Thanks.