# IO Error: could not spawn

**URL:** <https://discourse.julialang.org/t/io-error-could-not-spawn/83306>\
**Category:** New to Julia\
**Created:** [June 24, 2022, 11:52am UTC](https://discourse.julialang.org/t/io-error-could-not-spawn/83306 "2022-06-24T11:52:44Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![fsmith001](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/fsmith001/32/37173_2.png) [@fsmith001](https://discourse.julialang.org/u/fsmith001)\
**Post date:** [June 24, 2022, 11:52am UTC](https://discourse.julialang.org/t/io-error-could-not-spawn/83306/1 "2022-06-24T11:52:44Z")

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I am working on running a test suite and when I run it, all the tests pass, but then there is an error: “IO Error: could not spawn -n 4 /Applications/Julia-1.7.app/Contents/Resources/julia/bin/julia …” and this goes on with a list of directories and functions such as append! What could be causing this error and how might I fix it?