Learning Forum

[manoj.gupta]

Charge Solver error messages:

THz-PC-2(process 0): Solver terminated at step 3 of 1. Error : Drift-diffusion solver encountered an unexpected numeric error after 0 iterations.

This error may indicate a divergent simulation. Please verify your model configuration, or contact

Lumerical support for further assistance. (detail: Non-finite result detected in N update, domain 2. The simulation has diverged.)

THz-PC-2(process 0): The program terminated due to an error: Drift-diffusion solver encountered an unexpected numeric error

This error may indicate a divergent simulation. Please verify your model configuration, or contact

Lumerical support for further assistance. (detail: Non-finite result detected in N update, domain 2. The simulation has diverged.)

THz-PC-2(process 0): Error: there was an unknown parallel error. The error code is 9007, the process number is 0

 

[kghaffari]

Hi,

Convergence errors in CHARGE can occur due to different reasons including incorrect settings (e.g. assigned contacts being incorrect, missing materials) or the problem being difficult to solve (e.g. high field mobility model, large simulation region). I recommend looking into our convergence error troubleshooting post for more information.

Here specifically, what stands out is the large size of the simulated device. I recommend recreating a similar device (pn junction with similar geometry) but with smaller size. If the issue persists you need to double check your basic settings like geometries, assigned materials, and boundary conditions.

Otherwise the error is most likely related to the large size of the simulation. In that case adjusting the mesh so that the important features (like doping regions) are appropiately resolved while keeping the number of mesh as small as possible can be helpful.

Best regards