# ERROR: MethodError: no method matching enable\_finalizers()
**URL:** https://discourse.julialang.org/t/error-methoderror-no-method-matching-enable-finalizers/66928
**Category:** GPU
**Tags:** cuda
**Created:** [August 24, 2021, 5:41pm UTC](https://discourse.julialang.org/t/error-methoderror-no-method-matching-enable-finalizers/66928 "2021-08-24T17:41:56Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@PharmCat](https://discourse.julialang.org/u/PharmCat)
#### Post date: [August 24, 2021, 5:41pm UTC](https://discourse.julialang.org/t/error-methoderror-no-method-matching-enable-finalizers/66928/1 "2021-08-24T17:41:56Z")
I try to use `LinearAlgebra.LAPACK.potrf!('U', A)` and get:
```julia
ERROR: MethodError: no method matching enable_finalizers()
Closest candidates are:
enable_finalizers(::Bool) at gcutils.jl:117
Stacktrace:
[1] (::CUDA.APIUtils.var"#check_cache#7"{CUDA.APIUtils.HandleCache{CuContext, Ptr{Nothing}}, CuContext})(f::CUDA.APIUtils.var"#5#8")
@ CUDA.APIUtils ~\.julia\packages\CUDA\VGl9W\lib\utils\cache.jl:36
[2] (::CUDA.APIUtils.var"#check_cache#7"{CUDA.APIUtils.HandleCache{CuContext, Ptr{Nothing}}, CuContext})()
@ CUDA.APIUtils ~\.julia\packages\CUDA\VGl9W\lib\utils\cache.jl:20
[3] pop!(f::Function, cache::CUDA.APIUtils.HandleCache{CuContext, Ptr{Nothing}}, key::CuContext)
@ CUDA.APIUtils ~\.julia\packages\CUDA\VGl9W\lib\utils\cache.jl:40
[4] (::CUDA.CUSOLVER.var"#new_state#1292")(cuda::NamedTuple{(:device, :context, :stream, :math_mode, :math_precision), Tuple{CuDevice, CuContext, CuStream, CUDA.MathMode, Symbol}})
@ CUDA.CUSOLVER ~\.julia\packages\CUDA\VGl9W\lib\cusolver\CUSOLVER.jl:44
[5] (::CUDA.CUSOLVER.var"#1290#1296"{CUDA.CUSOLVER.var"#new_state#1292", NamedTuple{(:device, :context, :stream, :math_mode, :math_precision), Tuple{CuDevice, CuContext, CuStream, CUDA.MathMode, Symbol}}})()
@ CUDA.CUSOLVER ~\.julia\packages\CUDA\VGl9W\lib\cusolver\CUSOLVER.jl:58
[6] get!
@ .\dict.jl:465 [inlined]
[7] dense_handle()
@ CUDA.CUSOLVER ~\.julia\packages\CUDA\VGl9W\lib\cusolver\CUSOLVER.jl:57
[8] bufferSize
@ ~\.julia\packages\CUDA\VGl9W\lib\cusolver\dense.jl:28 [inlined]
[9] get_size
@ ~\.julia\packages\CUDA\VGl9W\lib\utils\call.jl:58 [inlined]
[10] with_workspace(f::CUDA.CUSOLVER.var"#948#951"{Char, CuArray{Float64, 2, CUDA.Mem.DeviceBuffer}, CuArray{Int32, 1, CUDA.Mem.DeviceBuffer}, Int64, Int64}, eltyp::Type{Float64}, size::CUDA.CUSOLVER.var"#bufferSize#950"{Char, CuArray{Float64, 2, CUDA.Mem.DeviceBuffer}, Int64, Int64}, fallback::Nothing) @ CUDA.APIUtils ~\.julia\packages\CUDA\VGl9W\lib\utils\call.jl:61
[11] with_workspace
@ ~\.julia\packages\CUDA\VGl9W\lib\utils\call.jl:58 [inlined]
[12] potrf!(uplo::Char, A::CuArray{Float64, 2, CUDA.Mem.DeviceBuffer})
@ CUDA.CUSOLVER ~\.julia\packages\CUDA\VGl9W\lib\cusolver\dense.jl:33
```
```julia
julia> CUDA.version()
v"11.4.0"
```
CUDA.jl version = “3.4.1”
What can it be?
---
### Author:  [@maleadt](https://discourse.julialang.org/u/maleadt)
#### Post date: [August 24, 2021, 5:47pm UTC](https://discourse.julialang.org/t/error-methoderror-no-method-matching-enable-finalizers/66928/2 "2021-08-24T17:47:55Z")
Which version of Julia?
---
### Author:  [@PharmCat](https://discourse.julialang.org/u/PharmCat)
#### Post date: [August 24, 2021, 5:48pm UTC](https://discourse.julialang.org/t/error-methoderror-no-method-matching-enable-finalizers/66928/3 "2021-08-24T17:48:26Z")
Version 1.6.0-beta1.0 (2021-01-08)
---
### Author:  [@maleadt](https://discourse.julialang.org/u/maleadt)
#### Post date: [August 24, 2021, 5:49pm UTC](https://discourse.julialang.org/t/error-methoderror-no-method-matching-enable-finalizers/66928/4 "2021-08-24T17:49:46Z")
That’s a very unsupported version; I recommend you upgrade to the released version of Julia 1.6.
---
### Author:  [@maleadt](https://discourse.julialang.org/u/maleadt)
#### Post date: [August 24, 2021, 5:51pm UTC](https://discourse.julialang.org/t/error-methoderror-no-method-matching-enable-finalizers/66928/5 "2021-08-24T17:51:11Z")
That said, CUDA.jl should probably stick to the documented version of this API, so I’ve created [https://github.com/JuliaGPU/CUDA.jl/pull/1111](https://github.com/JuliaGPU/CUDA.jl/pull/1111)
---
### Author:  [@PharmCat](https://discourse.julialang.org/u/PharmCat)
#### Post date: [August 24, 2021, 6:42pm UTC](https://discourse.julialang.org/t/error-methoderror-no-method-matching-enable-finalizers/66928/6 "2021-08-24T18:42:04Z")
Thanx! In Julia Version 1.6.2 (2021-07-14) it seems working fine!