/STOP
Engine Keyword The Engine is stopped, due to reached energy error ratio criteria, total mass ratio criteria or nodal mass ratio criteria.
Format
/STOP
E_{max} $\text{\Delta}{M}_{\mathrm{max}}$ $\text{\Delta}{N}_{\mathrm{max}}$ N_{TH} N_{ANIM} N_{ERR_POSIT}
Definitions
Field  Content  SI Unit Example 

E_{max}  Energy error ratio.
Defined as the ratio of the current simulation energy to the total
energy in the system. Unlike the energy error listed in the engine
output file, this value can be greater than 0.999 (99.9%). Default = 10^{30} 

$\text{\Delta}{M}_{\mathrm{max}}$  Total mass ratio criteria.
Defined as the ratio of total mass at a given time divided by the
initial mass. Default = 10^{30} 

$\text{\Delta}{N}_{\mathrm{max}}$  Nodal mass ratio criteria.
Defined for each node as the ratio of its mass divided by its
initial mass. The computation is stopped; if, at least, one node
meets the criteria. Default = 10^{30} 

N_{TH} 


N_{ANIM} 


N_{ERR_POSIT} 

Comments
 To find the divergence of the Engine run, it is better to only check for the positive energy error and not the negative energy error. To find early divergence, it is recommended to use N_{ERR_POSIT }= 1, N_{TH} = 1, N_{ANIM} = 1, and a relatively low value for E_{max}.
 The total mass criteria is defined as the ratio of total added mass at a given time divided by the initial total mass.
 The nodal mass ratio criteria is defined for each node as the ratio of its mass divided by its initial mass. The computation is stopped, if at least one node meets the criteria.
 A restart file is written, if the Engine is stopped, due to one of these events.