# KeyError: key \*\*\*\*\* \[86cd37e6-c0ff-550b-95fe-21d72c8d4fc9\] not found while calling "Serialization.deserialize(f)" function

**URL:** <https://discourse.julialang.org/t/keyerror-key-86cd37e6-c0ff-550b-95fe-21d72c8d4fc9-not-found-while-calling-serialization-deserialize-f-function/28442>\
**Category:** General Usage\
**Created:** [September 5, 2019, 7:54pm UTC](https://discourse.julialang.org/t/keyerror-key-86cd37e6-c0ff-550b-95fe-21d72c8d4fc9-not-found-while-calling-serialization-deserialize-f-function/28442 "2019-09-05T19:54:10Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![bsnyh](https://avatars.discourse-cdn.com/v4/letter/b/ce7236/32.png) [@bsnyh](https://discourse.julialang.org/u/bsnyh)\
**Post date:** [September 5, 2019, 7:54pm UTC](https://discourse.julialang.org/t/keyerror-key-86cd37e6-c0ff-550b-95fe-21d72c8d4fc9-not-found-while-calling-serialization-deserialize-f-function/28442/1 "2019-09-05T19:54:10Z")

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Hi. I got a KeyError as the above when using the package \*\*\*\*\*. Could anyone please let me know what might be wrong?

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**Author:** ![kristoffer.carlsson](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kristoffer.carlsson/32/22_2.png) [@kristoffer.carlsson](https://discourse.julialang.org/u/kristoffer.carlsson)\
**Post date:** [September 5, 2019, 7:55pm UTC](https://discourse.julialang.org/t/keyerror-key-86cd37e6-c0ff-550b-95fe-21d72c8d4fc9-not-found-while-calling-serialization-deserialize-f-function/28442/2 "2019-09-05T19:55:36Z")

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Check that your module name in `Package.jl` is correctly named and capitalized.

Edit: Nvm, the original post got edited.

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**Author:** ![bsnyh](https://avatars.discourse-cdn.com/v4/letter/b/ce7236/32.png) [@bsnyh](https://discourse.julialang.org/u/bsnyh)\
**Post date:** [September 5, 2019, 8:08pm UTC](https://discourse.julialang.org/t/keyerror-key-86cd37e6-c0ff-550b-95fe-21d72c8d4fc9-not-found-while-calling-serialization-deserialize-f-function/28442/3 "2019-09-05T20:08:13Z")

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where to find the file `Package.jl` ?

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**Author:** ![bsnyh](https://avatars.discourse-cdn.com/v4/letter/b/ce7236/32.png) [@bsnyh](https://discourse.julialang.org/u/bsnyh)\
**Post date:** [September 6, 2019, 10:33am UTC](https://discourse.julialang.org/t/keyerror-key-86cd37e6-c0ff-550b-95fe-21d72c8d4fc9-not-found-while-calling-serialization-deserialize-f-function/28442/4 "2019-09-06T10:33:46Z")

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I’m still confused though, what is exactly this “KeyError”? Why is the package name ever used as a key then? Could anyone explain it to me?