Problem initializing EM solver: Library not found

[sujith.samuel]

I am following Installation — Aerial Omniverse Digital Twin

when i generate the UE i get no error. However when i run the UE mobility it gives me this error

[INFO] Found attributes sim:duration/sim:interval so using default value of 1 sample per slot
[DEBUG] Scenario users: 1, batches: 1, slot/symbol mode: 0, slots_per_batch: 0, samples_per_slot: 1, duration (per batch): 10, interval: 1, ue_min_speed=1.5, ue_max_speed=2.5, is_seeded=0, seed=0

[DEBUG] [Before EM solver setup] GPU memory usage (in GB): 1.02448/79.0966 (1.3%)
[ERROR] Problem initializing EM solver: Library not found.
Recommend checking your scenario settings and GPU memory usage on compute node.
[DEBUG] sending message: “log” to: 5b6de6a6-c492-484f-9682-e5b91c51eb3a with payload:
{
“body”: “Problem initializing EM solver: Library not found.\nRecommend checking your scenario settings and GPU memory usage on compute node.”,
“level”: “[ERROR]”
}
[INFO] Waiting for DB ray write threads to complete. This may take a while if the simulation is very large.

[INFO] Finished computing and storing results in database Samuel_2025_2_26_14_11_1
[DEBUG] Duration of simulation = 2715 ms
[DEBUG] sending message: “start_sim_reply” to: 5b6de6a6-c492-484f-9682-e5b91c51eb3a with payload:
{
“start_success”: false
}
Please assist.

[sujith.samuel]

Finally i got it working my moving to an A100 for backend aodt_sim container and adding nvidia driver capabilities as all

}

[DEBUG] Found 662 paths for Tx 1

[DEBUG] Timing EMSolver: 1586.34 ms

[DEBUG] Adding 662 ray results to the cirs table

[DEBUG] Adding 65536 CFR results to clickhouse db

[DEBUG] [slot 9 end] GPU memory usage (in GB): 52.4248/79.1384 (66.2%)

[DEBUG] [slot 10 start] GPU memory usage (in GB): 52.4248/79.1384 (66.2%)

[INFO] Computing sample=11/11, batch=0 (wideband CFRs enabled, fft_size=4096)

[DEBUG] Adding 662 ray results to the raypaths table

[DEBUG] insertCIRs and insertRaypaths took 16 ms (thread_id=2)

[DEBUG] insertCFRs took 17 ms (thread_id=3)

[DEBUG] Found 716 paths for Tx 1

[DEBUG] Timing EMSolver: 1595.2 ms

[DEBUG] Adding 716 ray results to the cirs table

[DEBUG] Adding 65536 CFR results to clickhouse db

[DEBUG] [slot 10 end] GPU memory usage (in GB): 52.3936/79.1384 (66.2%)

[DEBUG] Inserting 2 panels into DB

[DEBUG] Adding 716 ray results to the raypaths table

[DEBUG] Inserting 1 patterns into DB

[DEBUG] insertCIRs and insertRaypaths took 17 ms (thread_id=2)

[DEBUG] insertCFRs took 22 ms (thread_id=3)

[INFO] Waiting for DB ray write threads to complete. This may take a while if the simulation is very large.

[INFO] Finished computing and storing results in database Samuel_2025_2_26_14_11_1

[kpasad1]

@sujith.samuel what was the initial GPU that gave you the library not found error?

[sujith.samuel]

Hello team

The initial gpu which I used was h100. But I also did not have the nvidia driver capabilities set to all. So now I made the change to a100 and enabled nvidia driver capabilities to all. Not sure if both changes did the trick or only the gpu change.

Thanks
Sujith.