# Julia.exe does nothing (Windows 7/10, julia 1.2 fresh installation)
**URL:** https://discourse.julialang.org/t/julia-exe-does-nothing-windows-7-10-julia-1-2-fresh-installation/29948
**Category:** New to Julia
**Created:** [October 15, 2019, 3:08pm UTC](https://discourse.julialang.org/t/julia-exe-does-nothing-windows-7-10-julia-1-2-fresh-installation/29948 "2019-10-15T15:08:49Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@fplancke](https://discourse.julialang.org/u/fplancke)
#### Post date: [October 15, 2019, 3:08pm UTC](https://discourse.julialang.org/t/julia-exe-does-nothing-windows-7-10-julia-1-2-fresh-installation/29948/1 "2019-10-15T15:08:49Z")
As the title says: julia.exe does nothing. When called without arguments, it exits after a split second without launching the REPL (as I would have expected, per the documentation and the behaviour of Julia 0.6.2). No output, no diagnostic, no idea how to solve this (and no entry in the FAQ as far as I can tell).
julia --version, julia --help seem to work fine: they print the expected information and quit.
This is on Windows 7 with a fresh installation of 1.2 (64 bits) alongside 0.6.2 + on Windows 10 with a fresh installation of 1.2 (64 bits), no older Julia version. Both installations using the Windows self-installer run as admin in c:\Programs\Julia-1.2.0
---
### Author:  [@fplancke](https://discourse.julialang.org/u/fplancke)
#### Post date: [October 15, 2019, 3:23pm UTC](https://discourse.julialang.org/t/julia-exe-does-nothing-windows-7-10-julia-1-2-fresh-installation/29948/2 "2019-10-15T15:23:35Z")
julia.exe (1.2) called on a source file fails with exit code 0xc000001d (= EXCEPTION\_ILLEGAL\_INSTRUCTION ???)
julia 0.6.2 works still fine.
ProcessMonitor on julia 1.2 does not show any error obviously relevant to the failure (but it shows that Julia tries to read many \*.pdb files it doensn’t find).
---
### Author:  [@fplancke](https://discourse.julialang.org/u/fplancke)
#### Post date: [October 15, 2019, 3:46pm UTC](https://discourse.julialang.org/t/julia-exe-does-nothing-windows-7-10-julia-1-2-fresh-installation/29948/3 "2019-10-15T15:46:02Z")
Running under a (Delphi) debugger, the error is apparently caused by an invalid x64 opcode in libopenblas64\_.dll (loaded from the julia 1.2 bin folder):
(libopenblas64\_.dll was loaded at 0x17740000)
```julia
000000001888703F 90 nop ; 14x nop
0000000018887040 55 push rbp
0000000018887041 62 db $62 ; <== HERE undefined x64 instruction (x86 BOUND)
0000000018887042 F1 db $f1
0000000018887043 7D48 jnl $000000001888708d
0000000018887045 EF out dx,eax
0000000018887046 C04889E5 ror byte ptr [rax-$77],$e5
000000001888704A 4157 push r15
000000001888704C 4156 push r14
000000001888704E 4155 push r13
0000000018887050 4154 push r12
0000000018887052 57 push rdi
0000000018887053 56 push rsi
0000000018887054 53 push rbx
0000000018887055 4883E4C0 and rsp,-$40
0000000018887059 4883EC40 sub rsp,$40
000000001888705D 4C8B5D30 mov r11,[rbp+$30]
0000000018887061 4885C9 test rcx,rcx
0000000018887064 7E34 jle $000000001888709a
```
What the hell is up ?
If I replace libopenblas64\_.dll with the one provided with Julia 0.6.2 it **solves my problem** , the REPL starts, with the following warning:
```julia
WARNING: Error during initialization of module LinearAlgebra:
ErrorException("could not load library "libopenblas64_"
The specified module could not be found.
")
┌ Error: Error during initialization of module CHOLMOD
│ exception =
│ could not load library "libcholmod"
│ The specified module could not be found.
│
│ Stacktrace:
│ [1] #dlopen#3(::Bool, ::typeof(Libdl.dlopen), ::String, ::UInt32) at C:\cygwin\home\Administrator\buildbot\worker\
package_win64\build\usr\share\julia\stdlib\v1.2\Libdl\src\Libdl.jl:109
│ [2] dlopen at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.2\Libdl\s
rc\Libdl.jl:109 [inlined] (repeats 2 times)
│ [3] __init__ () at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.2\Sui
teSparse\src\cholmod.jl:89
└ @ SuiteSparse.CHOLMOD C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.2\Sui
teSparse\src\cholmod.jl:176
```
As I probably don’t need openblas, that’s fine with me (so far).
**Edit** :
Someone has had the exact same problem on a Mac:
[https://github.com/JuliaLang/julia/issues/29652](https://github.com/JuliaLang/julia/issues/29652)
sadly, that issue was closed before 1.2 was out. I’m going to try Julia 1.3.0rc to see if it solves my problem, and follow-up on GitHub.
**Edit 2** :
For the record, the solution of setting the OPENBLAS\_CORETYPE env var suggested at the end of this GitHub issue work for me:
```julia
C:\Programs\Julia-1.2.0\bin>set OPENBLAS_CORETYPE=haswell
C:\Programs\Julia-1.2.0\bin>julia
_
_ _ _(_)_ | Documentation: https://docs.julialang.org
(_) | (_) (_) |
_ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 1.2.0 (2019-08-20)
_/ |\ __'_|_|_|\__'_| | Official https://julialang.org/ release
|__/ |
```
Now it works fine (without AVX512 instructions which I probably don’t have anyway).
---
### Author:  [@fplancke](https://discourse.julialang.org/u/fplancke)
#### Post date: [October 16, 2019, 8:49am UTC](https://discourse.julialang.org/t/julia-exe-does-nothing-windows-7-10-julia-1-2-fresh-installation/29948/4 "2019-10-16T08:49:43Z")
Same problem with Julia 1.3.0rc4; the same workaround works.
(As per the GitHub issue, the problem is apparently that OpenBLAS does not correctly determine AVX512 instruction set availability on certain virtualized machines.)