"/hello.jl did not return a UI function"

[pyrex41]

I this output for a basic hello world file from the tutorial as well as for many of the examples; others do not provide any output at all.

output:"... /hello.jl did not return a UI function"

I am running julia 0.5; is this the issue, or is there some other issue?

[shashi]

Um what's in hello.jl ?

A file you are trying to serve should end with a function definition such as:

function main(window) # must take an argument
end

And this function should return the UI object you want to render

[pyrex41]

hello.jl is just the hello world example 1 from escher-jl.org. Contains:

function main(window)
plaintext("Hello, World!")
end

Similar results for most example files as well.

[pyrex41]

I have recreated this issue on ubuntu as as well (initially on OSX), for both my created "hello.jl" file and on the example "forms.jl"

[Max-Tweddell]

I am having the same problem with most of the examples as well.
I haven't checked all of them yet though.

edit:
I have testing all of them and none of the examples work.
Index.jl also can not be found.

[Max-Tweddell]

Here is a gist paste of the terminal output when I try to load the vectorgraphics example.
https://gist.github.com/Quixoticelixer/b38661a1cf067df809962ec0026aa50e

[Stinners]

The version of Escher you get from Pkg.add hasn't been updated for v0.5, go to ~/.julia/v0.5/Escher and checkout the master branch to get a working version of the code.

[Nectarineimp]

I tried @Stinners solution, but it didn't seem to work.
I'm on Windows 7 Pro (Work machine, don't judge :-) ), I have Julia 0.5.0. 16GB of memory. My code looks like:

function main(window)
    plaintext("Hello, World!")
end

Right after I start escher --serve and try to run the simple plaintext("Hello World!") example I get the following:

C:\Users\Peter.Mancini.julia\v0.5\Escher\bin>julia -- escher --serve
WARNING: Method definition require(Symbol) in module Base at loading.jl:345 overwritten in module Escher at C:\Users\Peter.Mancini.julia\v0.5\Requires\src\require.jl:12.
Listening on 0.0.0.0:5555...
WARNING: readbytes is deprecated, use read instead.
in depwarn(::String, ::Symbol) at .\deprecated.jl:64
in readbytes(::IOStream, ::Vararg{IOStream,N}) at .\deprecated.jl:30
in open(::Base.#readbytes, ::String) at .\iostream.jl:113
in fileresponse(::String) at C:\Users\Peter.Mancini.julia\v0.5\Mux\src\examples\files.jl:22
in fresp(::String) at C:\Users\Peter.Mancini.julia\v0.5\Mux\src\examples\files.jl:26
in (::##30#32{String})(::Dict{Any,Any}) at C:\Users\Peter.Mancini.julia\v0.5\Escher\src\cli\serve.jl:219
in (::Mux.##5#6{##29#31{String,Bool},##30#32{String}})(::Function, ::Dict{Any,Any}) at C:\Users\Peter.Mancini.julia\v0.5\Mux\src\Mux.jl:15
in (::Mux.##1#2{Mux.##5#6{##29#31{String,Bool},##30#32{String}},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}})(::Dict{Any,Any}) at C:\Users\Peter.Mancini.julia\v0.5\Mux\src\Mux.jl:8
in (::Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},Mux.##1#2{Mux.##5#6{##29#31{String,Bool},##30#32{String}},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}})(::Function, ::Dict{Any,Any}) at C:\Users\Peter.Mancini.julia\v0.5\Mux\src\Mux.jl:15
in splitquery(::Mux.##1#2{Mux.#toresponse,Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},Mux.##1#2{Mux.##5#6{##29#31{String,Bool},##30#32{String}},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},Mux.##1#2{Mux.##5#6{Mux.##40#42{String,Bool},Mux.##41#43{String}},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},##35#39},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},##36#40},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}}}}}, ::Dict{Any,Any}) at C:\Users\Peter.Mancini.julia\v0.5\Mux\src\basics.jl:28
in basiccatch(::Mux.##1#2{Mux.#splitquery,Mux.##1#2{Mux.#toresponse,Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},Mux.##1#2{Mux.##5#6{##29#31{String,Bool},##30#32{String}},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},Mux.##1#2{Mux.##5#6{Mux.##40#42{String,Bool},Mux.##41#43{String}},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},##35#39},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},##36#40},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}}}}}}, ::Dict{Any,Any}) at C:\Users\Peter.Mancini.julia\v0.5\Mux\src\basics.jl:78
in (::Mux.##1#2{Mux.#basiccatch,Mux.##1#2{Mux.#splitquery,Mux.##1#2{Mux.#toresponse,Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},Mux.##1#2{Mux.##5#6{##29#31{String,Bool},##30#32{String}},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},Mux.##1#2{Mux.##5#6{Mux.##40#42{String,Bool},Mux.##41#43{String}},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},##35#39},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},##36#40},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}}}}}}})(::Dict{Any,Any}) at C:\Users\Peter.Mancini.julia\v0.5\Mux\src\Mux.jl:8
in (::Mux.##3#4{Mux.##3#4{Mux.#todict,Mux.#basiccatch},Mux.#splitquery})(::Function, ::HttpCommon.Request) at C:\Users\Peter.Mancini.julia\v0.5\Mux\src\Mux.jl:12
in (::Mux.##1#2{Mux.##3#4{Mux.##3#4{Mux.##3#4{Mux.#todict,Mux.#basiccatch},Mux.#splitquery},Mux.#toresponse},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},Mux.##1#2{Mux.##5#6{##29#31{String,Bool},##30#32{String}},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},Mux.##1#2{Mux.##5#6{Mux.##40#42{String,Bool},Mux.##41#43{String}},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},##35#39},Mux.##1#2{Mux.##5#6{Mux.##33#34{Array{SubString{String},1}},##36#40},Mux.##1#2{Mux.##23#24{Mux.##27#28{Symbol,Int64}},Mux.##25#26{String}}}}}}})(::HttpCommon.Request) at C:\Users\Peter.Mancini.julia\v0.5\Mux\src\Mux.jl:8
in (::Mux.##7#10{Mux.App})(::HttpCommon.Request, ::HttpCommon.Response) at C:\Users\Peter.Mancini.julia\v0.5\Mux\src\server.jl:31
in (::HttpServer.#on_message_complete#18{HttpServer.Server,HttpServer.Client{TCPSocket},Bool})(::HttpCommon.Request) at C:\Users\Peter.Mancini.julia\v0.5\HttpServer\src\HttpServer.jl:427
in on_message_complete(::Ptr{HttpParser.Parser}) at C:\Users\Peter.Mancini.julia\v0.5\HttpServer\src\RequestParser.jl:104
in http_parser_execute(::HttpParser.Parser, ::HttpParser.ParserSettings, ::Array{UInt8,1}) at C:\Users\Peter.Mancini.julia\v0.5\HttpParser\src\HttpParser.jl:115
in process_client(::HttpServer.Server, ::HttpServer.Client{TCPSocket}, ::Bool) at C:\Users\Peter.Mancini.julia\v0.5\HttpServer\src\HttpServer.jl:389
in (::HttpServer.##8#10{HttpServer.Server,Bool})() at .\task.jl:360
while loading C:\Users\Peter.Mancini.julia\v0.5\Escher\bin\escher, in expression starting on line 48
WARNING: C:\Users\Peter.Mancini.julia\v0.5\Escher\bin\myTest.jl did not return a function