Simulations crashing simultaneously after changing boundary conditions
 

Hi
I am simulating 2D CD Nozzle flows using rhoCentralFoam solver. Some details from controlDict are as follows:
StartTime : 0;
Endtime : 0.500;
deltaT : 1e-5;
writeControl : runtime ;
writeinterval : 0.01;
Purgewrite : 0;
According to this, I should get 50 directories after running command rhoCentralFoam. But simulation is crashing for specific boundary conditions and not omitting all 50 directories.
Initially, I thought it's occurring because of colourant number getting bigger than 1(approximate value of deltax is 5/6), so I tried to adjustableRuntime instead of runtime, but I faced same error. What should I do to get steady state situation? Anyone knows about the boundary conditions one should use while simulating CD Nozzle flow?
Thank you.