File error in OCReract writing to temp folder

I’m very new to Julia.
Trying to read text from an image.
Using OCReract, tried the suggested code.

begin
using Images
using ImageMagick
using OCReract
img_path = "Q:\\Julia\\20.jpg"; #small jpg with just the text "20" (no quotes)
img = Images.load(img_path);  
run_tesseract(img, psm=3, oem=1);
end

Gives an error in the PowerShell window:

Error: Error ocurred while running Tesseract! Base.IOError("could not spawn `tesseract '%temp%\\jl_hiMWotDCCe.png' '%temp%\\jl_zF2TaOBbHP.txt' --oem 1 --psm 3`: no such file or directory (ENOENT)", -4058)
@ OCReract %userprofile%\.julia\packages\OCReract\vBTZj\src\tesseract.jl:122

And an error in the browser:

SystemError: opening file "%temp%\\jl_zF2TaOBbHP.txt": No such file or directory

#systemerror#49(::Nothing, ::typeof(systemerror), ::String, ::Int32)@error.jl:168
#systemerror#48@error.jl:167[inlined]
systemerror@error.jl:167[inlined]
#open#542(::Bool, ::Bool, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::typeof(open), ::String)@iostream.jl:284
#open#543(::Bool, ::typeof(open), ::String, ::String)@iostream.jl:346
open(::String, ::String)@iostream.jl:346
#open#287(::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::typeof(open), ::OCReract.var"#3#4", ::String, ::Vararg{String,N} where N)@io.jl:323
open@io.jl:323[inlined]
#run_tesseract#2(::Nothing, ::Int64, ::Int64, ::typeof(OCReract.run_tesseract), ::Array{ColorTypes.RGB{FixedPointNumbers.Normed{UInt8,8}},2})@tesseract.jl:202
top-level scope@Local: 8

Julia can read and write to disk, and all the folders exist.
What have I forgotten to do?
Thanks,
m.