Hi,
I just wanted to give Knet a go in my ubuntu machine running Julia 1.7.0, but surprisingly things fail… I just installed it as standard
@(v1.7) pkg> add Knet
@(v1.7) pkg> test Knet
@(v1.7) pkg> test Knet
…
Testing Running tests…
kptr.jl Knet: Error During Test at /home/mazzanti/.julia/packages/Knet/RCkV0/test/runtests.jl:7
Got exception outside of a @test
LoadError: UndefVarError: usage not defined
Stacktrace:
[1] usedmem()
@ Main ~/.julia/packages/Knet/RCkV0/test/kptr.jl:46
[2] top-level scope
@ ~/.julia/packages/Knet/RCkV0/test/kptr.jl:47
[3] include
@ ./client.jl:451 [inlined]
[4] macro expansion
@ ./timing.jl:220 [inlined]
[5] macro expansion
@ ~/.julia/packages/Knet/RCkV0/test/runtests.jl:4 [inlined]
[6] macro expansion
@ ~/JULIA/julia-1.7.0/share/julia/stdlib/v1.7/Test/src/Test.jl:1283 [inlined]
[7] top-level scope
@ ~/.julia/packages/Knet/RCkV0/test/runtests.jl:11
[8] include(fname::String)
@ Base.MainInclude ./client.jl:451
[9] top-level scope
@ none:6
[10] eval
@ ./boot.jl:373 [inlined]
[11] exec_options(opts::Base.JLOptions)
@ Base ./client.jl:268
[12] _start()
@ Base ./client.jl:495
in expression starting at /home/mazzanti/.julia/packages/Knet/RCkV0/test/kptr.jl:43
Test Summary: | Pass Error Total
Knet | 23 1 24
kptr:alloc | 8 8
kptr:gc | 7 7
kptr:realloc | 8 8
ERROR: LoadError: Some tests did not pass: 23 passed, 0 failed, 1 errored, 0 broken.
in expression starting at /home/mazzanti/.julia/packages/Knet/RCkV0/test/runtests.jl:7
ERROR: Package Knet errored during testing
so it does not pass the tests 
Now even so, I try to follow the examples from
https://knet.readthedocs.io/en/v0.7.3/intro.html
and already at the very beginning, when I throw the first example function,
the system complains about the @knet
@knet function linreg(x)
w = par(dims=(1,13), init=Gaussian(0,0.1))
b = par(dims=(1,1), init=Constant(0))
return w * x .+ b
end
LoadError: UndefVarError: @knet not defined
in expression starting at In[2]:1
Stacktrace:
[1] top-level scope
@ :0
[2] eval
@ ./boot.jl:373 [inlined]
[3] include_string(mapexpr::typeof(REPL.softscope), mod::Module, code::String, filename::String)
@ Base ./loading.jl:1196
Now I’m not sure whether this is due to the fact that this tutorial seems old and the macro is no longer available, or because my Knet installation did not make it, or what…
I’ll be more than grateful if somebody here can shed some light onto how to solve these issues 
Thanks a lot,
Ferran.