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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"RuntimeError: In function void opencl::fft_inplace","articleBody":"Using this arrayfire release (https://arrayfire.s3.amazonaws.com/3.8.0/ArrayFire-v3.8.0_Linux_x86_64.sh) on the opencl backend with the python api I get the following error.  \r\n```python\r\nimport arrayfire as af\r\naf.set_backend('opencl')\r\nrandom_signal = af.random.randn(100)\r\ntest = af.signal.fft(random_signal)\r\n```\r\nError\r\n```\r\n---------------------------------------------------------------------------\r\nRuntimeError                              Traceback (most recent call last)\r\n\u003cipython-input-7-a744aa37e707\u003e in \u003cmodule\u003e\r\n----\u003e 1 test = af.signal.fft(random_signal)\r\n\r\n~/miniconda3/envs/af/lib/python3.7/site-packages/arrayfire/signal.py in fft(signal, dim0, scale)\r\n    177 \r\n    178     output = Array()\r\n--\u003e 179     safe_call(backend.get().af_fft(c_pointer(output.arr), signal.arr, c_double_t(scale), c_dim_t(dim0)))\r\n    180     return output\r\n    181 \r\n\r\n~/miniconda3/envs/af/lib/python3.7/site-packages/arrayfire/util.py in safe_call(af_error)\r\n     77         err_len = c_dim_t(0)\r\n     78         backend.get().af_get_last_error(c_pointer(err_str), c_pointer(err_len))\r\n---\u003e 79         raise RuntimeError(to_str(err_str))\r\n     80 \r\n     81 def get_version():\r\n\r\nRuntimeError: In function void opencl::fft_inplace(opencl::Array\u003cT\u003e\u0026, int, bool) [with T = cl_float2]\r\nIn file src/backend/opencl/fft.cpp:\r\n```\r\n\r\nI'm running Ubuntu 20.04 with Nvidia OpenCL Drivers. I have arrayfire debugging enabled and got the following output when the error occurred.  \r\n\r\n```\r\n                        BUILD LOG\r\n************************************************\r\n\u003ckernel\u003e:19:10: error: expected expression\r\n(float2)(};\r\n         ^\r\n\u003ckernel\u003e:891:1: error: expected '}'\r\n^\r\n\u003ckernel\u003e:18:32: note: to match this '{'\r\n__constant float2 twiddles[] = {\r\n                               ^\r\n\u003ckernel\u003e:890:2: error: expected ';' after top level declarator\r\n}\r\n ^\r\n ;\r\n\r\n************************************************\r\nFFTGeneratedStockhamAction::compileKernels failed\r\n\r\n```\r\n\r\n\r\n","author":{"url":"https://github.com/brianmcconnel","@type":"Person","name":"brianmcconnel"},"datePublished":"2021-05-07T22:41:24.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/255/arrayfire-python/issues/255"}