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<< Click to Display Table of Contents >> Navigation: Workflow for a CONVERGE CFD Simulation > Diagnostic Information > Simulation Errors |
Simulation errors usually cause the simulation to crash. Table 11 below lists common types of these errors and gives examples for each type.
If a crash occurs in CONVERGE 6, a detailed stack trace is written to CONVERGE_error_rank<number>.log, where <number> indicates the processor rank on which the error occurred. If you need help resolving an error, send this file along with the main log file to the support team for your region.
Table 11: Common types of simulation errors with examples.
Error Type |
Example |
Explanation of example |
Missing inputs
|
initialized species not found in mech.dat |
A species with an initialized value in initialize.in is not part of the reaction mechanism specified in file mech.dat. |
must provide a file for an arbitrary moving boundary |
You have not supplied a motion file (e.g., arbitrary_motion.in) for an arbitrarily moving boundary. |
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A mismatch between the specified input and the input CONVERGE expects based on the specified type of simulation |
boundary between disconnect regions can only translate or rotate |
You have specified a motion type for a boundary between two disconnected regions other than TR (Translating) or RO (Rotating). |
disconnect group between regions 0 1: CLOSED while attached boundary region 1 is moving |
A disconnect group between two regions has been defined as CLOSED while a boundary in region 1 is actually moving. All OPEN/CLOSE events must occur only when the boundaries adjacent to the disconnect triangles are stationary. |
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Computational errors |
equilibrium solver did not converge |
The specified models or submodels did not converge to specified tolerances. |
Kill/termination signals |
Signal 9 |
The operating system has killed your simulation. This commonly occurs when you run out of memory. Try getting more memory, making the case smaller, or running the case on more nodes. |
Signal 15 |
Another program has terminated your simulation. This commonly occurs when a scheduled job runs out of time and is killed by the scheduler. |
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Running CONVERGE on GPU errors |
This a GPU targeted build. It can only be used for cases with inputs_in:gpu_solver:true. Please turn on this flag or use a CPU targeted build |
You have attempted to run a GPU targeted build using a case set up with the gpu_solver flag in inputs.in > hpc_control turned OFF. You must set up the CONVERGE environment to run on a CPU before running this case. If your intent was to run on GPUs, then set gpu_solver = 1 to run CONVERGE on GPUs. |
This is a CPU targeted build. It can only be used for cases with inputs_in:gpu_solver:false. Please turn off this flag or use a GPU targeted build. |
You have attempted to run a CPU targeted build using a case set up with the gpu_solver flag in inputs.in > hpc_control turned ON. You must set up the CONVERGE environment to run on GPUs before running this case. If your intent was to run on CPUs, then set gpu_solver = 0 to run CONVERGE on CPUs. |