"dump_modify every "command

Dear everyone:

I got an “Error: Dump every variable returned a bad timestep” when running a simulation.

Modify the dump command, read the dump step from a file. Some line:


100980000
100990000
101000000
999999999

My simulation stops at timestep 101000000. I got an Error: Dump every variable returned a bad timestep.
If replacing 999999999 by 2100000000, it works correctly.
I don’t know why.

Is this a serious problem, Who can explain this ?

Thank you!