# Default test " brian2cuda.example\_run()" throws error after installation? **URL:** \ **Category:** Support\ **Tags:** brian2cuda\ **Created:** [3 November 2025 06:49 UTC](https://brian.discourse.group/t/default-test-brian2cuda-example-run-throws-error-after-installation/1504 "2025-11-03T06:49:11Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![alexyz](https://avatars.discourse-cdn.com/v4/letter/a/6de8d8/32.png) [@alexyz](https://brian.discourse.group/u/alexyz)\ **Post date:** [3 November 2025 06:49 UTC](https://brian.discourse.group/t/default-test-brian2cuda-example-run-throws-error-after-installation/1504/1 "2025-11-03T06:49:11Z")
# Description of problem I’m trying to install Brian2CUDA as mentioned in [Installation — Brian2CUDA 1.0.0 documentation](https://brian2cuda.readthedocs.io/en/latest/introduction/install.html) , but the default installation throws an error on my Ubuntu WSL on Windows 11, and I can’t get even a basic install to work at all? # Minimal code to reproduce problem ```bash wsl --install # wsl --unregister Ubuntu # wsl --install -d Ubuntu gcc --version wget https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh bash ./Miniconda3-latest-Linux-x86_64.sh source ~/.bashrc conda --version sudo apt-key del 7fa2af80 wget https://developer.download.nvidia.com/compute/cuda/repos/wsl-ubuntu/x86_64/cuda-wsl-ubuntu.pin sudo mv cuda-wsl-ubuntu.pin /etc/apt/preferences.d/cuda-repository-pin-600 wget https://developer.download.nvidia.com/compute/cuda/11.6.0/local_installers/cuda-repo-wsl-ubuntu-11-6-local_11.6.0-1_amd64.deb sudo dpkg -i cuda-repo-wsl-ubuntu-11-6-local_11.6.0-1_amd64.deb sudo apt-key add /var/cuda-repo-wsl-ubuntu-11-6-local/7fa2af80.pub sudo apt-get update sudo apt-get -y install cuda export PATH=${PATH}:/usr/local/cuda-11.6/bin export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/local/cuda-11.6/lib64 nvcc --version python -c "import brian2cuda; brian2cuda.example_run()" ``` # What you have already tried Tried with both CUDA Toolkit version 13.0 (which threw a `Thrust requires at least C++17. Define CCCL_IGNORE_DEPRECATED_CPP_DIALECT to suppress this message.` error) and version 11.6.0 (which threw `sh: 1: make: not found` from the traceback below). Please help me do a clean install on WSL so I can run Brian on my PC’s GPU, thanks in advance! # Full traceback of error ```bash python -c "import brian2cuda; brian2cuda.example_run()" /home/buidl/miniconda3/lib/python3.13/site-packages/setuptools/_distutils/_msvccompiler.py:12: UserWarning: _get_vc_env is private; find an alternative (pypa/distutils#340) warnings.warn( INFO CUDA installation directory detected via location of `nvcc` binary: /usr/local/cuda-11.6 [brian2cuda.utils.gputools] INFO Compiling device code for GPU 0 (NVIDIA GeForce RTX 4070) [brian2cuda.utils.gputools] INFO Compiling device code for compute capability 8.9 (compiler flags: ['-arch=sm_89']) [brian2cuda.device] INFO Using the following preferences for CUDA standalone: [brian2cuda.device] INFO devices.cuda_standalone.SM_multiplier = 1 [brian2cuda.device] INFO devices.cuda_standalone.parallel_blocks = 1 [brian2cuda.device] INFO devices.cuda_standalone.launch_bounds = False [brian2cuda.device] INFO devices.cuda_standalone.syn_launch_bounds = False [brian2cuda.device] INFO devices.cuda_standalone.calc_occupancy = True [brian2cuda.device] INFO devices.cuda_standalone.extra_threshold_kernel = True [brian2cuda.device] INFO devices.cuda_standalone.random_number_generator_type = CURAND_RNG_PSEUDO_DEFAULT [brian2cuda.device] INFO devices.cuda_standalone.random_number_generator_ordering = False [brian2cuda.device] INFO devices.cuda_standalone.push_synapse_bundles = True [brian2cuda.device] INFO devices.cuda_standalone.threads_per_synapse_bundle = {max} [brian2cuda.device] INFO devices.cuda_standalone.bundle_threads_warp_multiple = False [brian2cuda.device] INFO devices.cuda_standalone.no_pre_references = False [brian2cuda.device] INFO devices.cuda_standalone.no_post_references = False [brian2cuda.device] INFO devices.cuda_standalone.default_functions_integral_convertion = [brian2cuda.device] INFO devices.cuda_standalone.use_atomics = True [brian2cuda.device] INFO devices.cuda_standalone.profile_statemonitor_copy_to_host = None [brian2cuda.device] INFO devices.cuda_standalone.cuda_backend.gpu_heap_size = 128 [brian2cuda.device] INFO devices.cuda_standalone.cuda_backend.detect_gpus = True [brian2cuda.device] INFO devices.cuda_standalone.cuda_backend.gpu_id = None [brian2cuda.device] INFO devices.cuda_standalone.cuda_backend.extra_compile_args_nvcc = ['-w', '-use_fast_math'] [brian2cuda.device] INFO devices.cuda_standalone.cuda_backend.compute_capability = None [brian2cuda.device] INFO devices.cuda_standalone.cuda_backend.detect_cuda = True [brian2cuda.device] INFO devices.cuda_standalone.cuda_backend.cuda_path = None [brian2cuda.device] INFO devices.cuda_standalone.cuda_backend.cuda_runtime_version = None [brian2cuda.device] INFO devices.cuda_standalone.cuda_backend.device_query_path = None [brian2cuda.device] sh: 1: make: not found ERROR Brian 2 encountered an unexpected error. If you think this is a bug in Brian 2, please report this issue either to the discourse forum at , or to the issue tracker at . Please include this file with debug information in your report: /tmp/brian_debug_2yd9_gbq.log You can also include a copy of the redirected std stream outputs, available at '/tmp/brian_stdout_yylgcg7h.log' and '/tmp/brian_stderr_crm6cx23.log'. Thanks! [brian2] Traceback (most recent call last): File "", line 1, in import brian2cuda; brian2cuda.example_run() ~~~~~~~~~~~~~~~~~~~~~~ ^^ File "/home/buidl/miniconda3/lib/python3.13/site-packages/brian2cuda/ __init__.py", line 73, in example_run device.build(direct_call=False, directory=directory, **build_options) ~~~~~~~~~~~~ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/buidl/miniconda3/lib/python3.13/site-packages/brian2cuda/device.py", line 1499, in build self.compile_source(directory, cpp_compiler, debug, clean) ~~~~~~~~~~~~~~~~~~~ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/buidl/miniconda3/lib/python3.13/site-packages/brian2/devices/cpp_standalone/device.py", line 1185, in compile_source raise RuntimeError(error_message) RuntimeError: Project compilation failed (error code: 32512). Consider running with "clean=True" to force a complete rebuild. ``` ---
**Author:** ![mstimberg](https://yyz2.discourse-cdn.com/free1/user_avatar/brian.discourse.group/mstimberg/32/11_2.png) [@mstimberg](https://brian.discourse.group/u/mstimberg)\ **Post date:** [3 November 2025 10:12 UTC](https://brian.discourse.group/t/default-test-brian2cuda-example-run-throws-error-after-installation/1504/3 "2025-11-03T10:12:33Z")
Hi @alexyz. Unfortunately, none of the developers uses `brian2cuda` via WSL on Windows, so we don’t have much experience with this setup. From the error message, it seems to be missing the `make` utility. Could you try installing the `build-essential` package (which will install `make` and maybe other things)? ```bash sudo apt-get install build-essential ``` Please let us know whether this helps! ---
**Author:** ![alexyz](https://avatars.discourse-cdn.com/v4/letter/a/6de8d8/32.png) [@alexyz](https://brian.discourse.group/u/alexyz)\ **Post date:** [3 November 2025 10:15 UTC](https://brian.discourse.group/t/default-test-brian2cuda-example-run-throws-error-after-installation/1504/4 "2025-11-03T10:15:23Z")
Thanks for the super fast response Marcel! I spent the whole day fighting this and was finally able to make it work by picking older versions of multiple packages, listing them here for anyone reading this in the future: - Ubuntu: 22.04 on WSL distro - gcc: 11.4.0 - CUDA Toolkit (and thus nvcc): 12.5.0 - Brian2CUDA: 1.0a8