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Editorial Team
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Asked: 2026-06-08T19:03:26+00:00

i have installed: CUDA sdk 4.2 64, CUDA toolkit 4.2 64, CUDA devdriver 4.2

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i have installed:
CUDA sdk 4.2 64,
CUDA toolkit 4.2 64,
CUDA devdriver 4.2 64,

I checked every nvcuda.dll in \windows – all of them, are 4.2 version, but when i create a context with driver api and check it verison with cuCtxGetApiVersion – it shows me “3010”

I do not really care about that version, but when i try to use runtime api with that context(need to mix them) – it shows me error 49(cudaErrorIncompatibleDriverContext)

any ideas, what is going on and how to make it work together?

seems it is not some issue with windows – running the same project under linux results in the same 3010 API version.

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1 Answer

  1. Editorial Team

    I solved the problem – i was exporting “cuCtxCreate” function directly during execution(it is other language – no cuda.h). After looking in original cuda.h i found that it defines other name for that functrion, basing on some sort of smartass defines.
    And that new function “cuCtxCreate_v2” creates a good context.

    /facepalm

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