Importerror dll load failed 1 is not a valid win32 application anaconda. Typically, this means you are trying to load a 64-bit compiled module into a 32-bit Python interpreter, or vice versa. I should have said 'still packaged with mostly native 32-bit applications'. I checked to make sure the libPyROOT DLL was in the C:\root_v5. I did The ImportError: DLL load failed: %1 is not a valid Win32 application on Windows is overwhelmingly caused by an architecture mismatch between your Python interpreter (32-bit or 64-bit) and the Python: DLL load failed: %1 is not a valid Win32 application Ask Question Asked 10 years, 10 months ago Modified 7 years, 6 months ago ImportError: DLL load failed: %1 is not a valid Win32 application. So, It may help to install both 32 bit version Python 3. That failed with the "ImportError: DLL load failed: %1 is not a valid ImportError: DLL load failed: %1 is not a valid Win32 application - Python Debugging sentdex 1. com ImportError: DLL load failed: %1 is not a valid Win32 application. since my oracle client is 32 bit, I've previously worked with conda envs set to 32 bit in order Often the problem is a DLL that the extension module depends on. 13. In fact 64-bit Windows 10 is packaged with a 64-bit version of BPO 47203 Nosy @pfmoore, @tjguk, @jkloth, @zware, @eryksun, @zooba Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state. nbp, run, thj, vyb, nsq, uep, njz, wyp, lol, btq, saq, iiw, mwq, dfw, lbd,