# Distributed.RemoteException key error

**URL:** <https://discourse.julialang.org/t/distributed-remoteexception-key-error/37580>\
**Category:** New to Julia\
**Tags:** question\
**Created:** [April 14, 2020, 6:35pm UTC](https://discourse.julialang.org/t/distributed-remoteexception-key-error/37580 "2020-04-14T18:35:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sundarnpanch](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/sundarnpanch/32/14070_2.png) [@sundarnpanch](https://discourse.julialang.org/u/sundarnpanch)\
**Post date:** [April 14, 2020, 6:35pm UTC](https://discourse.julialang.org/t/distributed-remoteexception-key-error/37580/1 "2020-04-14T18:35:54Z")

</div>

Hi, I am new to Julia and this forum too. I am using the distributed computing facility in JuliaBox and I seem to encounter the following error while using the fetch() function. Can someone guide me with the issue here?

```nohighlight
using Distributed
addprocs(6)

r = @spawnat 4 rand(4,4)
Future(4, 1, 8, nothing)

fetch(r)
output:
Distributed.RemoteException(4, CapturedException(KeyError(Distributed [top-level]), Any[(getindex at dict.jl:477 [inlined], 1), (root_module at loading.jl:962 [inlined], 1), (deserialize_module at Serialization.jl:894, 1), (handle_deserialize at Serialization.jl:799, 1), (deserialize at Serialization.jl:722, 1), (deserialize_datatype at Serialization.jl:1192, 1), (handle_deserialize at Serialization.jl:775, 1), (deserialize at Serialization.jl:722, 1), (handle_deserialize at Serialization.jl:782, 1), (deserialize at Serialization.jl:722 [inlined], 1), (deserialize_msg at messages.jl:99, 1), (#invokelatest#1 at essentials.jl:709 [inlined], 1), (invokelatest at essentials.jl:708 [inlined], 1), (message_handler_loop at process_messages.jl:185, 1), (process_tcp_streams at process_messages.jl:142, 1), (#101 at task.jl:333, 1)]))
'''
```

---

<div class="post-metadata">

**Author:** ![jishnub](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jishnub/32/33620_2.png) [@jishnub](https://discourse.julialang.org/u/jishnub)\
**Post date:** [April 19, 2020, 7:22am UTC](https://discourse.julialang.org/t/distributed-remoteexception-key-error/37580/2 "2020-04-19T07:22:06Z")

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You might need to load the `Distributed` package on the workers after you add them. Try running

```julia
addprocs(6)
@everywhere using Distributed

```

and then your code