Odd Error

From: Dimitry Ayzenberg <dayzenbe_at_andrew.cmu.edu>
Date: Thu, 17 Sep 2009 17:54:57 -0400

I got this error when running a simulation and I'm not really sure what it
means. Can someone help me please?

dimitry_at_Phoenix:~/Desktop/Gadget-2.0.4/Gadget2$ ./Gadget2
/home/dimitry/Desktop/Gadget-2.0.4/Gadget2/parameterfiles/test.param
Note: This is a massively parallel code, but you are running with 1
processor only.
Compared to an equivalent serial code, there is some unnecessary overhead.

This is Gadget, version `2.0'.

Running on 1 processors.

Allocated 5 MByte communication buffer per processor.

Communication buffer has room for 119156 particles in gravity computation
Communication buffer has room for 40960 particles in density computation
Communication buffer has room for 32768 particles in hydro computation
Communication buffer has room for 32768 particles in domain decomposition


Hubble (internal units) = 4.66672e-05
G (internal units) = 1
UnitMass_in_g = 1.99e+30
UnitTime_in_s = 1.44e+13
UnitVelocity_in_cm_per_s = 1
UnitDensity_in_cgs = 6.66447e-10
UnitEnergy_in_cgs = 1.99e+30


Allocated 0.0972748 MByte for particle storage. 68


reading file `/home/dimitry/Desktop/Gadget-2.0.4/ICs/test.dat' on task=0
(contains 1000 particles.)
distributing this file to tasks 0-0
Type 0 (gas): 0 (tot= 0000000000) masstab=0
Type 1 (halo): 1000 (tot= 0000001000) masstab=1
Type 2 (disk): 0 (tot= 0000000000) masstab=0
Type 3 (bulge): 0 (tot= 0000000000) masstab=0
Type 4 (stars): 0 (tot= 0000000000) masstab=0
Type 5 (bndry): 0 (tot= 0000000000) masstab=0

reading done.
Total number of particles : 0000001000

allocated 0.0762939 Mbyte for ngb search.

Allocated 0.847687 MByte for BH-tree. 64

domain decomposition...
NTopleaves= 64
work-load balance=1 memory-balance=1
domain decomposition done.
begin Peano-Hilbert order...
Peano-Hilbert done.
Begin Ngb-tree construction.
Ngb-Tree contruction finished

Setting next time for snapshot file to Time_next= 0


writing snapshot file...
done with snapshot.

Setting next time for snapshot file to Time_next= 0.03


Begin Step 0, Time: 0, Systemstep: 0
domain decomposition...
NTopleaves= 64
work-load balance=1 memory-balance=1
domain decomposition done.
begin Peano-Hilbert order...
Peano-Hilbert done.
Start force computation...
Tree construction.
Tree construction done.
Begin tree force.
tree is done.
Begin tree force.
tree is done.
force computation done.

Error: A timestep of size zero was assigned on the integer timeline!
We better stop.
Task=0 Part-ID=941 dt=nan tibase=1.11759e-08 ti_step=-2147483648 ac=nan
xyz=(-452|-490|-389) tree=(nan|nannan)

task 0: endrun called with an error level of 818


application called MPI_Abort(MPI_COMM_WORLD, 818) - process 0

Thanks,
Dimitry
Received on 2009-09-17 23:55:00