# Debugger.@enter: failed to lookup source code, showing lowered code

**URL:** <https://discourse.julialang.org/t/debugger-enter-failed-to-lookup-source-code-showing-lowered-code/45774>\
**Category:** General Usage\
**Tags:** question\
**Created:** [August 30, 2020, 12:24am UTC](https://discourse.julialang.org/t/debugger-enter-failed-to-lookup-source-code-showing-lowered-code/45774 "2020-08-30T00:24:49Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![tim.holy](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tim.holy/32/52_2.png) [@tim.holy](https://discourse.julialang.org/u/tim.holy)\
**Post date:** [August 30, 2020, 7:58am UTC](https://discourse.julialang.org/t/debugger-enter-failed-to-lookup-source-code-showing-lowered-code/45774/2 "2020-08-30T07:58:42Z")

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Are you using Revise? The ability of the debugger to locate your source code is significantly improved by using Revise.

Be sure you remember [PSA: pin Revise at 2](https://discourse.julialang.org/t/psa-pin-revise-at-2/44412)

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