I’m now getting these errors with Gnuplot.jl:
Cound not start a gnuplot process with command "gnuplot". Enabling dry sessions...
How does one debug something like this? I checked, and gnuplot can be started from the shell mode and works.
Do you have gnuplot installed? What happens when you just type in gnuplot in bash?
That’s interesting. well the error is telling you it can’t find the gnuplot binary so might be issues with your PATH variable or something like that. Are you by any chance running WSL/WSL2?
I don’t get it. The Julia executable runs in a bash. The shell mode clearly can find the gnuplot executable.
Where is the attempts to find the executable made?
Can you post more information? What version of windows, what terminal, are you running WSL/WSL2?.
Where is the attempts to find the executable made?
I don’t know but will certainly take a look for you.
Windows 10. Sublime Text runs in a Git bash. Here is the same attempt made in a Terminus running first a bash (which can find gnuplot), then julia, which cannot find the executable apparently.
The code that launches the executable is Gnuplot.jl/Gnuplot.jl at master · gcalderone/Gnuplot.jl (github.com)
Thanks for the information… seems normal, could you paste the relevant code from the julia script ?
This is interesting: the PATH environment variable is not found:
That’s probably the issue then. The path variable may only be defined for specific shells. Can you try setting the PATH in the Windows environmental variables GUI.
Does this look okay?
shell> gnuplot --version
gnuplot 5.4 patchlevel 3
PATH: It is actually set. And it does include gnuplot path.
I tweaked the function a little bit, and I’m getting:
julia> function gpversion()
icmd = `gnuplot --version`
@show proc = open(`$icmd`, read=true)
@show s = String(read(proc))
if !success(proc)
error("An error occurred while running: " * string(icmd))
end
s = split(s, " ")
ver = ""
for token in s
try
@show ver = VersionNumber("$token")
break
catch
end
end
if ver < v"5.0"
error("gnuplot ver. >= 5.0 is required, but " * string(ver) * " was found.")
end
return ver
end
gpversion (generic function with 1 method)
julia> gpversion()
proc = open(`$icmd`, read = true) = Process(`gnuplot --version`, ProcessRunning)
s = String(read(proc)) = ""
So it looks like the reading from the process failed?
Seems like that. Here is my output
julia> using Gnuplot
julia> Gnuplot.gpversion()
v"5.4.0"
julia>
I have
julia> proc = open(`gnuplot --version`, read = true)
Process(`gnuplot --version`, ProcessRunning)
julia> String(read(proc))
""
What about using just powershell or cmd? Do you have Windows Terminal as well? Maybe there is something weird with Sublime/git bash?
The key seems to be reading from the process: I am getting an empty string.
The correct version can be obtained with gnuplot 5.2.8, but not with the newest (5.4.3). The plotting works just fine with 5.2.8.
See also: How do I debug this error? · Issue #58 · gcalderone/Gnuplot.jl · GitHub