The run of an application paused

The run of an application paused, nothing happened within 18 hours.

the output from terminal is:

THERMAL MOTION OF GAS NOT INCLUDED

ELECTRIC FIELD =  16237.7674 VOLTS/CM.
MAGNETIC FIELD =     0.0000 KILOGAUSS.
ANGLE BETWEEN ELECTRIC AND MAGNETIC FIELD =    90.000 DEGREES.
CYCLOTRON FREQ. =   0.000D+00 RADIANS/PICOSECOND

INITIAL ELECTRON ENERGY =\*\*\*\*\*\*\*\* EV.

TOTAL NUMBER OF REAL COLLISIONS =  400000000

NULL COLLISION FREQUENCY AT  8 EQUALLY SPACED ENERGY INTERVALS (\*10\*\*12/SEC)
0.123D+00      0.492D-01      0.308D-01      0.275D-01
0.273D-01      0.293D-01      0.287D-01      0.289D-01

REAL COLLISION FREQUENCY AT  8 EQUALLY SPACED ENERGY INTERVALS (\*10\*\*12/SEC)
0.417D-01      0.296D-01      0.272D-01      0.267D-01
0.267D-01      0.271D-01      0.277D-01      0.285D-01

VEL      POS        TIME      ENERGY   COUNT   DIFXX     DIFYY     DIFZZ


## 11841.45  0.433D+04  0.365D+091491.3473   100   \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*       0.0
11847.53  0.866D+04  0.731D+091493.9381   200   \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*       0.0
11846.19  0.130D+05  0.110D+101493.3684   300   \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*
11849.16  0.173D+05  0.146D+101494.9139   400   \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*
11850.60  0.216D+05  0.183D+101496.0465   500   \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*
11851.36  0.260D+05  0.219D+101496.4778   600   \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*
11849.71  0.303D+05  0.256D+101496.3913   700   \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*
11851.33  0.346D+05  0.292D+101497.2041   800   \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*
11850.20  0.390D+05  0.329D+101496.5886   900   \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*
11847.98  0.433D+05  0.365D+101495.7969  1000   \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*  \*\*\*\*\*\*\*\*

---

CALCULATED MAX. COLLISION TIME = 517.38 PICOSECONDS.

NUMBER OF NULL COLLISIONS =   49428079
NUMBER OF REAL COLLISIONS =  400000000

Z DRIFT VELOCITY = 0.1185E+05 MICRONS/NANOSECOND  ±    0.03%
Y DRIFT VELOCITY = 0.0000E+00 MICRONS/NANOSECOND  ±    0.00%
X DRIFT VELOCITY = 0.0000E+00 MICRONS/NANOSECOND  ±    0.00%

       DIFFUSION IN CM**2/SEC.

TRANSVERSE DIFFUSION   = 0.4796D+08 ±    3.57%
= 657.3316 EV. ±    3.57%
= 2845.405 MICRONS/CENTIMETER\*\*0.5  ±    1.78%

LONGITUDINAL DIFFUSION = 0.7248D+09 ±     2.6%
=9933.1029 EV. ±    2.58%
=11060.998 MICRONS/CENTIMETER\*\*0.5  ±    1.29%

IONISATION RATE /CM.= 0.3505D+02 +/-  0.01 PERCENT.
ATTACHMENT RATE /CM.= 0.0000D+00 +/-  0.00 PERCENT.

MEAN ELECTRON ENERGY =1495.7969 EV. ERROR =  ±    0.10%

## SOLUTION FOR STEADY STATE TOWNSEND PARAMETERS

SPACE STEP BETWEEN SAMPLING PLANES = 0.36880D+03 MICRONS.

the key codes of the application are:

MediumMagboltz gas;
gas.SetComposition("Ar", 90., "ch4", 10.);
gas.SetTemperature(293.15);
gas.SetPressure(76.);
gas.SetFieldGrid(100., 1e5, 20, true);
int ncoll = 10;
gas.GenerateGasTable(ncoll);
gas.WriteGasFile("0.1bar.gas");
      

what is the possible reason to cause this?

Maybe @hschindl can help

The combination high electric field and low pressure always runs into troubles because of extremely high ionization rates. Works welll: pressure 1bar + Efield range 100V/cm - 100kV/cm. Consider running only up to 10kV/cm if you change your pressure to 0.1bar. You can use the exponential scaling for the extrapolation later on, but you should consider to calculate the gasfile only for the electric fields you actually use in your experiment.