[FLASH-USERS] Error while using cosmology Module

[M.A. Latife]

 Hi,
Dear all,
I am simulating gravitational collapse( Grvity module + hydro module + cooling ) and i have included cooling as well. My simulation were running fine but when i  have plugged in  cosmological Module.
 module . it starts giving an error. that desired time step is lower than 
 minimum . when i reduce the time step it again gives this message
 look at the output below.
 why it is happening like this? can you suggest something.
 
kind regards
Latife

 *** Wrote output to testsph_hdf5_plt_cnt_0000 ***
       n          t         dt |  dt_hydro  dt_cosmo 
       1 4.3639E+15 1.8928E+10 |  1.893E+10 6.546E+14
       2 4.3640E+15 2.0004E+10 |  2.000E+10 6.546E+14
       3 4.3640E+15 2.0354E+10 |  2.035E+10 6.546E+14
       4 4.3640E+15 2.0405E+10 |  2.040E+10 6.546E+14
       5 4.3641E+15 2.0438E+10 |  2.044E+10 6.546E+14
       6 4.3641E+15 2.0436E+10 |  2.044E+10 6.546E+14
       7 4.3642E+15 2.0428E+10 |  2.043E+10 6.546E+14
       8 4.3642E+15 2.0416E+10 |  2.042E+10 6.546E+14
       9 4.3642E+15 2.0404E+10 |  2.040E+10 6.546E+14
      10 4.3643E+15 2.0392E+10 |  2.039E+10 6.546E+14
      11 4.3643E+15 2.0380E+10 |  2.038E+10 6.546E+14
      12 4.3644E+15 2.0369E+10 |  2.037E+10 6.546E+14
      13 4.3644E+15 2.0359E+10 |  2.036E+10 6.546E+14
      14 4.3644E+15 2.0351E+10 |  2.035E+10 6.546E+14
      15 4.3645E+15 2.0346E+10 |  2.035E+10 6.546E+14
      16 4.3645E+15 2.0343E+10 |  2.034E+10 6.547E+14
      17 4.3646E+15 2.0342E+10 |  2.034E+10 6.547E+14
      18 4.3646E+15 2.0343E+10 |  2.034E+10 6.547E+14
      19 4.3646E+15 2.1490E+10 |  2.149E+10 6.547E+14
      20 4.3647E+15 2.2372E+10 |  2.237E+10 6.547E+14
      21 4.3647E+15 3.1002E+10 |  3.100E+10 6.547E+14
 WARNING: desired timestep < dtmin, using dtmin
      22 4.3648E+15 1.0000E+08 |  1.160E+06 6.547E+14
 WARNING: desired timestep < dtmin, using dtmin
      23 4.3648E+15 1.0000E+08 |  1.838E-04 6.547E+14
 WARNING: desired timestep < dtmin, using dtmin
      24 4.3648E+15 1.0000E+08 |  3.838-104 6.547E+14
 WARNING: desired timestep < dtmin, using dtmin
      25 4.3648E+15 1.0000E+08 |  0.000E+00 6.547E+14
 min_blocks        450 max_blocks        450 tot_blocks        450
      26 4.3648E+15 2.0000E+08 |  6.547E+14
      27 4.3648E+15 4.0000E+08 |  6.547E+14
      28 4.3648E+15 8.0000E+08 |  6.547E+14
      29 4.3648E+15 1.6000E+09 |  6.547E+14
      30 4.3648E+15 3.2000E+09 |  6.547E+14
      31 4.3648E+15 6.4000E+09 |  6.547E+14