See https://github.com/stevengj/PyPlot.jl/issues/140 . The problem stems 
from name conflicts between the system libraries libopenblas.so and 
liblapack.so and the versions of those two libraries that Julia downloads, 
compiles, and installs internally.The solution (at least on Linux) is to 
find your system libraries and preload them with 

export LD=/usr/lib64/libopenblas.so:/usr/lib64/liblapack.so

prior to starting Julia. Steven Johnson has a bug fix in place, but it 
requires the BLAS and LAPACK packages to accept his patch, and some time 
for those patches to get released. 

John


On Saturday, October 3, 2015 at 11:46:36 AM UTC-4, LarryD wrote:
>
> Hi
>
> I started by removing my old version of Julia and deleting the 
> c:\users\larry\.julia file  (Windows 10, 64 bit). Then I installed rc3.
>
> I tried running a program I've used before, starting with
>
> Pkg.add("PyPlot")
> Pkg.update()
> using PyPlot
>
> Everything seemed to be going OK until the following:
>
> julia> using PyPlot
> INFO: Precompiling module PyPlot...
> INFO: Recompiling stale cache file 
> C:\Users\Larry\.julia\lib\v0.4\PyPlot.ji for module PyPlot.
> WARNING: Module BinDeps uuid did not match cache file
> ERROR: __precompile__(true) but require failed to create a precompiled 
> cache file in require at loading.jl:252
>
> julia> x = 1:100
> 1:100
>
> julia> plot(x)
> ERROR: UndefVarError: plot not defined
>
> I don't know what I'm doing wrong and would greatly appreciate some help.
>
> Thanks,
>
> Larry
>
>

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