NameError: name '_C' is not defined again and again, it made me mad, cuda installed , nvcc worked well

[xdfai4x]

Hi, my os is Ubuntu 24.04 desktop, with a RTX 4090 card, I deploy this project for so many times but I always got this error.
Is there anybody can help me with that?
here is my environments:
$ echo $CUDA_HOME
/usr/local/cuda-12.6

$ ll /usr/local/cuda-12.6
drwxr-xr-x 15 root root 4096 Nov 2 19:26 ./
drwxr-xr-x 15 root root 4096 Nov 5 15:31 ../
drwxr-xr-x 3 root root 4096 Nov 2 19:26 bin/
drwxr-xr-x 5 root root 4096 Nov 2 19:26 compute-sanitizer/
drwxr-xr-x 3 root root 4096 Nov 2 19:26 doc/
-rw-r--r-- 1 root root 160 Sep 12 17:51 DOCS
-rw-r--r-- 1 root root 63021 Sep 12 17:51 EULA.txt
drwxr-xr-x 4 root root 4096 Nov 2 19:26 extras/
drwxr-xr-x 3 root root 4096 Nov 2 19:26 gds/
lrwxrwxrwx 1 root root 28 Sep 12 17:47 include -> targets/x86_64-linux/include/
lrwxrwxrwx 1 root root 24 Sep 12 17:47 lib64 -> targets/x86_64-linux/lib/
drwxr-xr-x 7 root root 4096 Nov 2 19:26 libnvvp/
drwxr-xr-x 2 root root 4096 Nov 2 19:26 nsightee_plugins/
drwxr-xr-x 3 root root 4096 Nov 2 19:26 nvml/
drwxr-xr-x 6 root root 4096 Nov 2 19:26 nvvm/
-rw-r--r-- 1 root root 524 Sep 12 17:51 README
drwxr-xr-x 3 root root 4096 Nov 2 19:26 share/
drwxr-xr-x 2 root root 4096 Nov 2 19:26 src/
drwxr-xr-x 3 root root 4096 Nov 2 19:26 targets/
drwxr-xr-x 2 root root 4096 Nov 2 19:26 tools/
-rw-r--r-- 1 root root 3297 Sep 20 02:21 version.json
$ ll /usr/local/cuda-12.6/bin
drwxr-xr-x 3 root root 4096 Nov 2 19:26 ./
drwxr-xr-x 15 root root 4096 Nov 2 19:26 ../
-rwxr-xr-x 1 root root 88848 Sep 12 18:07 bin2c*
lrwxrwxrwx 1 root root 4 Sep 19 23:24 computeprof -> nvvp*
-rwxr-xr-x 1 root root 112 Sep 12 22:21 compute-sanitizer*
drwxr-xr-x 2 root root 4096 Nov 2 19:26 crt/
-rwxr-xr-x 1 root root 7674584 Sep 12 18:07 cudafe++*
-rwxr-xr-x 1 root root 1951 Sep 12 18:51 cuda-gdb*
-rwxr-xr-x 1 root root 13757288 Sep 12 18:51 cuda-gdb-minimal*
-rwxr-xr-x 1 root root 16040360 Sep 12 18:51 cuda-gdb-python3.10-tui*
-rwxr-xr-x 1 root root 16040032 Sep 12 18:51 cuda-gdb-python3.11-tui*
-rwxr-xr-x 1 root root 16048512 Sep 12 18:51 cuda-gdb-python3.12-tui*
-rwxr-xr-x 1 root root 16040248 Sep 12 18:51 cuda-gdb-python3.8-tui*
-rwxr-xr-x 1 root root 16040296 Sep 12 18:51 cuda-gdb-python3.9-tui*
-rwxr-xr-x 1 root root 825936 Sep 12 18:51 cuda-gdbserver*
-rwxr-xr-x 1 root root 75928 Sep 12 18:00 cu++filt*
-rwxr-xr-x 1 root root 708112 Sep 12 17:53 cuobjdump*
-rwxr-xr-x 1 root root 1245272 Sep 12 18:07 fatbinary*
-rwxr-xr-x 1 root root 3826 Sep 20 02:21 ncu*
-rwxr-xr-x 1 root root 3616 Sep 20 02:21 ncu-ui*
-rwxr-xr-x 1 root root 1580 Sep 12 18:09 nsight_ee_plugins_manage.sh*
-rwxr-xr-x 1 root root 197 Sep 20 02:21 nsight-sys*
-rwxr-xr-x 1 root root 743 Sep 20 02:21 nsys*
-rwxr-xr-x 1 root root 833 Sep 20 02:21 nsys-ui*
-rwxr-xr-x 1 root root 23091656 Sep 12 18:07 nvcc*
-rwxr-xr-x 1 root root 10456 Sep 12 18:07 __nvcc_device_query*
-rw-r--r-- 1 root root 425 Sep 12 18:07 nvcc.profile
-rwxr-xr-x 1 root root 50683896 Sep 12 17:53 nvdisasm*
-rwxr-xr-x 1 root root 31360568 Sep 12 18:07 nvlink*
-rwxr-xr-x 1 root root 6030656 Sep 20 00:16 nvprof*
-rwxr-xr-x 1 root root 113664 Sep 12 17:49 nvprune*
-rwxr-xr-x 1 root root 285 Sep 19 23:24 nvvp*
-rwxr-xr-x 1 root root 31026944 Sep 12 18:07 ptxas*

$ nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2024 NVIDIA Corporation
Built on Thu_Sep_12_02:18:05_PDT_2024
Cuda compilation tools, release 12.6, V12.6.77
Build cuda_12.6.r12.6/compiler.34841621_0

It really made me so sad, what's the problem?
any commets will good, really appriciate.
thanks.

[prashantmetadome]

+1 facing this issue

[JiannBai]

me too

[phucbienvan]

I also encountered this error.

[debryu]

Same problem here