# Type Float32 has no field data
**URL:** https://discourse.julialang.org/t/type-float32-has-no-field-data/35397
**Category:** General Usage
**Created:** [March 2, 2020, 11:38am UTC](https://discourse.julialang.org/t/type-float32-has-no-field-data/35397 "2020-03-02T11:38:53Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Eldho.Ashna](https://discourse.julialang.org/u/Eldho.Ashna)
#### Post date: [March 2, 2020, 11:38am UTC](https://discourse.julialang.org/t/type-float32-has-no-field-data/35397/1 "2020-03-02T11:38:53Z")
Hi all,
When I ran the following code snippet from JuliaAcademy,
```julia
using Printf
train_loss = Float64[]
test_loss = Float64[]
function update_loss!()
push!(train_loss, L(trainbatch...).data)
push!(test_loss, L(testbatch...).data)
@printf("train loss = %.2f, test loss = %.2f\n", train_loss[end], test_loss[end])
end
Flux.train!(L, params(model), Iterators.repeated(trainbatch, 1000), opt; cb = Flux.throttle(update_loss!, 1))
```
I’m getting the following error:
```julia
type Float32 has no field data
Stacktrace:
[1] getproperty(::Float32, ::Symbol) at ./Base.jl:20
[2] update_loss!() at ./In[38]:5
[3] (::Flux.var"#throttled#16#21"{Bool,Bool,typeof(update_loss!),Int64})(::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Flux.var"#throttled#20"{Flux.var"#throttled#16#21"{Bool,Bool,typeof(update_loss!),Int64}}) at /home/g2-test/.julia/packages/Flux/2i5P1/src/utils.jl:167
[4] throttled at /home/g2-test/.julia/packages/Flux/2i5P1/src/utils.jl:163 [inlined]
[5] macro expansion at /home/g2-test/.julia/packages/Flux/2i5P1/src/optimise/train.jl:72 [inlined]
[6] macro expansion at /home/g2-test/.julia/packages/Juno/oLB1d/src/progress.jl:134 [inlined]
[7] #train!#12(::Flux.var"#throttled#20"{Flux.var"#throttled#16#21"{Bool,Bool,typeof(update_loss!),Int64}}, ::typeof(Flux.Optimise.train!), ::Function, ::Zygote.Params, ::Base.Iterators.Take{Base.Iterators.Repeated{Tuple{Array{Float64,2},Flux.OneHotMatrix{Array{Flux.OneHotVector,1}}}}}, ::Descent) at /home/g2-test/.julia/packages/Flux/2i5P1/src/optimise/train.jl:66
[8] (::Flux.Optimise.var"#kw##train!")(::NamedTuple{(:cb,),Tuple{Flux.var"#throttled#20"{Flux.var"#throttled#16#21"{Bool,Bool,typeof(update_loss!),Int64}}}}, ::typeof(Flux.Optimise.train!), ::Function, ::Zygote.Params, ::Base.Iterators.Take{Base.Iterators.Repeated{Tuple{Array{Float64,2},Flux.OneHotMatrix{Array{Flux.OneHotVector,1}}}}}, ::Descent) at ./none:0
[9] top-level scope at In[39]:1
```
Can someone help me to solve this.
---
### Author:  [@pixel27](https://discourse.julialang.org/u/pixel27)
#### Post date: [March 2, 2020, 12:50pm UTC](https://discourse.julialang.org/t/type-float32-has-no-field-data/35397/2 "2020-03-02T12:50:40Z")
I haven’t used flux, but my guess is that `L(trainbatch...)` and `L(testbatch...)` are returning a Float32 **not** a structure with a data element. So you change:
```julia
train_loss = Float64[]
test_loss = Float64[]
push!(train_loss, L(trainbatch...).data)
push!(test_loss, L(testbatch...).data)
```
to:
```julia
train_loss = Float32[]
test_loss = Float32[]
push!(train_loss, L(trainbatch...))
push!(test_loss, L(testbatch...))
```
Does that work?
---
### Author:  [@quantiota](https://discourse.julialang.org/u/quantiota)
#### Post date: [April 27, 2020, 3:03pm UTC](https://discourse.julialang.org/t/type-float32-has-no-field-data/35397/3 "2020-04-27T15:03:45Z")
i got the same error.
---
### Author:  [@DrChainsaw](https://discourse.julialang.org/u/DrChainsaw)
#### Post date: [April 27, 2020, 5:03pm UTC](https://discourse.julialang.org/t/type-float32-has-no-field-data/35397/4 "2020-04-27T17:03:35Z")
Example is outdated. Try to remove `.data`.
Before version 0.10, flux used a special array type to track gradients and to get the actual data you needed to access through the data property. Now that it doesn’t use this special type you get an error for trying to access the field from a raw float.
---
### Author:  [@quantiota](https://discourse.julialang.org/u/quantiota)
#### Post date: [May 1, 2020, 5:49pm UTC](https://discourse.julialang.org/t/type-float32-has-no-field-data/35397/5 "2020-05-01T17:49:16Z")
@DrChainsaw
thanks, it works