Something must be wrong in your simulation setup. It is unlikely to be due to the fact that it is a multiport simulation (since under the hood a multiport simulation is just a bunch of "single" FDTD simulations). I would suggest you check the voxels of your simulation (View Voxels) and ensure that they accurately represent what you are trying to simulate. Pay special attention to the sources and the connectivity between the sources and the various PEC elements.

Hi Anna, I see that nobody answered to your question. Were you able to run this type of simulation? I would like to to a phototermal therapy as well using metallic nanoparticles with a laser. I am not sure if with sim4life this type of simulation can be done or not. If you could tell your experience on this, it would be great. Thanks in advance for your time and help, All the best, @AnnaGol

Hi Michael, Yes, this sounds reasonable. You define the frequency in the Setup settings of the simulation, and you define three boundary conditions, -1, +1, and 0V. Best, Habib

Hi Marcus, This doesn't appear to be related to Windows Defender. However, from the log you pasted, it is not exactly the tutorial of TMS. The grid is different than what is described in the tutorial, and there is an additional object in the simulation "Reference_Plane". Something in your setup is not correct anymore and cause the solver to fail. With the amount of information I have here, I cannot suggest a solution. Please try to run the tutorial as it is (maybe open the project file and run it, instead of building it from scratch), and see if this one fails too. Best, Habib

Hi @VigneshYork Please carefully check that the voxels of the edge sources are correctly generated. You can use the "Connectivity" mode under in Voxel Viewer to check that the edge sources are correctly connected. If that is not the case, you need to work on the grid to fix the issue.

Hi @wouterverhelst This error can appear with simulations having a non-optimal grid with at least one very small cell leading to a very small step size. Could you please inspect the grid in your simulation and see if it can be improved? Please use "Connectivity" option in voxel view to make sure that the source is connected. If possible, please share more info, for example, parts of the log file where you can see min grid step, time step and initialization of source(s): [INFO]: Number of cells: … [INFO]: Number of cells including PML: … [INFO]: X: Range [.. ... .. ] with minimal .. and maximal step .. [m] [INFO]: Y: Range [.. ... .. ] with minimal .. and maximal step .. [m] [INFO]: Y: Range [.. ... .. ] with minimal .. and maximal step .. [m] … [INFO]: Simulation Time Step: … sec … [INFO]: Sources: [INFO]: Initializing edge source Lines 1 (Sources) … …

Dear Habib, Works! Thank you!

Hello Rehmanuzair, I think the problem is about the system connection You have to go to task manager then you find the networking where you connect the system. and you will be able to Run.

Could you paste the whole log? If the problem runs in 1 GPU, could you test that? Can you try reducing the grid resolution and see if it runs successfully then?

Hi, "bad allocation" usually refers to errors due to not enough memory. GPUs have limited on-board memory and if the simulation size exceeds this, it fails to run. I would advice to check your system memory status, and if the simulation is too heavy, using a coarse grid (less MCells) can help.

@Mélina This is close to what I want but not exactly. I still want ARES to say I can use both GPU's but I want to be able to say "for simulation 1 run on GPU0, for simulation 2 run on GPU1" . Is there anyway to do this? I tried messing around with the concurrent jobs number (setting it to 2 or 3 or 1) in ARES but I don't believe it's working correctly as I still am only running 1 simulation at a time in the queue.

Try and do it programmatically in the python scripter. Set one figure up how you want it then right click on the final slice viewer in the explorer tab and click "to python". Then just look for the bounds there, save the script, and use that for all of your other figures.

Yes, bad alloc means the memory could not be allocated. Try to reduce grid size, and ensure your subgrid is substantially smaller than the total computational grid.

Thank you Ofli for your quick response. That was very helpful!

Dear Liu, Yes, in order to see any losses, you need to set at least a conductivity different to 0. I would advice you to check if you set correct electric properties in the material settings. Best