# Loading of Flux model using BSON: Tracker not found error?

**URL:** <https://discourse.julialang.org/t/loading-of-flux-model-using-bson-tracker-not-found-error/33659>\
**Category:** Machine Learning\
**Tags:** question\
**Created:** [January 22, 2020, 1:12pm UTC](https://discourse.julialang.org/t/loading-of-flux-model-using-bson-tracker-not-found-error/33659 "2020-01-22T13:12:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![compleat](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/compleat/32/8958_2.png) [@compleat](https://discourse.julialang.org/u/compleat)\
**Post date:** [January 22, 2020, 1:12pm UTC](https://discourse.julialang.org/t/loading-of-flux-model-using-bson-tracker-not-found-error/33659/1 "2020-01-22T13:12:08Z")

</div>

I am having difficulty loading a BSON-saved Flux model via:

BSON.@load “my\_model.jls”

resulting the error

ERROR: LoadError: UndefVarError: Tracker not defined

even though I had explicitly loaded Tracker via

using Flux.Tracker

Does anyone have a clue what this is about?

Alternatively, is there another (more reliable?) way to save Flux models?

PS Both machines were versions of Flux recently-loaded using Pkg.add in Julia 1.20  
PPS above load attempted with Flux v0.1, saved model built with previous (but recent) version of Flux (v0.09?)

[BTW, please let me know if there is a specific Flux forum - I couldn’t find one]