Mona Dataset Code RuntimeError: Unable to find target for this triple (no targets are registered)

Benchmark & Challenges
1

Hello, I put this in the Benchmark & Challenges category because there was another entry about Mona. Please let me know if that is not the right one.

I try to get the mona dataset code to run but first the folder structure is very different from the Readme and then, when I execute mona detect on “reference_drives/raw/east_outgoing/east-000-000.yaml” I get an error already during the import. Here the copied error:

mona detect ./reference_drives/raw/east_outgoing/east-000-000.yaml ./mona_test_output/
Total progress:   0%|                                                                                                                                                                      | 0/1 [00:00<?, ?file/s]Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/multiprocessing/spawn.py", line 105, in spawn_main
    exitcode = _main(fd)
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/multiprocessing/spawn.py", line 115, in _main
    self = reduction.pickle.load(from_parent)
  File "/home/saschaho/Repositories/mona-dataset/mona/detection/detector.py", line 22, in <module>
    from mona.detection.detection import (
  File "/home/saschaho/Repositories/mona-dataset/mona/detection/detection.py", line 10, in <module>
    from .mask_util import (
  File "/home/saschaho/Repositories/mona-dataset/mona/detection/mask_util.py", line 79, in <module>
    def _find_contours(cnts: np.ndarray, rows: int) -> np.ndarray:
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/decorators.py", line 258, in njit
    return jit(*args, **kws)
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/decorators.py", line 179, in jit
    return wrapper(pyfunc)
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/decorators.py", line 210, in wrapper
    **dispatcher_args)
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/dispatcher.py", line 824, in __init__
    self.targetctx = self.targetdescr.target_context
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/registry.py", line 47, in target_context
    return self._toplevel_target_context
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/utils.py", line 430, in __get__
    val = self.func(instance)
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/registry.py", line 31, in _toplevel_target_context
    return cpu.CPUContext(self.typing_context, self._target_name)
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/cpu.py", line 41, in __init__
    super().__init__(typingctx, target)
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/base.py", line 262, in __init__
    self.init()
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/compiler_lock.py", line 35, in _acquire_compile_lock
    return func(*args, **kwargs)
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/cpu.py", line 50, in init
    self._internal_codegen = codegen.JITCPUCodegen("numba.exec")
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/codegen.py", line 1172, in __init__
    self._init(self._llvm_module)
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/numba/core/codegen.py", line 1177, in _init
    target = ll.Target.from_triple(ll.get_process_triple())
  File "/home/saschaho/anaconda3/envs/mona-toolchain/lib/python3.7/site-packages/llvmlite/binding/targets.py", line 197, in from_triple
    raise RuntimeError(str(outerr))
RuntimeError: Unable to find target for this triple (no targets are registered)
Total progress:   0%|

Is this a known problem or can somebody help me fix it?

2

Hi,
I have tried to reproduce your problem using the minimal docker image of our repository. However, I didn’t encounter the problem you showed. I have added some instructions on how to use the docker image for the toolchain. Could you try again using the image?

3

Hi,

thank you for the quick response. Unfortunately due to safety concerns, Docker is not an option on the machine I am doing this. Let me see if I somehow moved away from the installation instructions and debug this a bit on my own.

Could you say a word about the data structure of the downloadable data? It seems to me its very different from the README so I don’t know the train, val and test split? This may be the same issue if I am using the wrong file.

Thank you already!

4

It seems your problem stems from a numba jit compiled function. You could try to remove the decorator here and here.

Regarding the data structure, the reference_drives folder contains the trajectories recorded on our test vehicle and serves as our test data. videos and processed contain the raw and processed data of the full dataset.

1 Like
5

That worked! Thank you. Not sure what the reason was but that solved it and I was able to run the detection script.

6

You can close this thread.