tikzexternalize in TeXMaker doesn't work [closed]

Question

I'm having some troubles while compiling my thesis with the tikz externalize feature in Texmaker. I created the user command:

"D:/laTex/texlive2014/bin/win32/pdflatex.exe" -synctex=1 -interaction=nonstopmode --shell-escape %.tex

I'm using this in my preamble:

\documentclass{article}
\usepackage{tikz}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\usepgfplotslibrary{external}    %if I comment this
\tikzexternalize[prefix=tikz/]   %and this the process goes fine
\usepackage[mmddyyyy]{datetime}
\begin{document}
\today
\begin{tikzpicture}
\begin{axis}[
xlabel=$x$,
ylabel={$f(x) = x^2 - x +4$}
]
% use TeX as calculator:
\addplot {x^2 - x +4};
\end{axis}
\end{tikzpicture}
\end{document}

but anyways it doesn't works.

I receive this in the error windows:

Package tikz Error: Sorry, the system call 'pdflatex -halt-on-error -interact
ion=batchmode -jobname "tikz/minexample-figure0" "\def\tikzexternalrealjob{mine
xample}\input{minexample}"' did NOT result in a usable output file 'tikz/minexa
mple-figure0' (expected one of .pdf:.jpg:.jpeg:.png:). Please verify that you h
ave enabled system calls. For pdflatex, this is 'pdflatex -shell-escape'. Somet
imes it is also named 'write 18' or something like that. Or maybe the command s
imply failed? Error messages can be found in 'tikz/minexample-figure0.log'. If 
you continue now, I'll try to typeset the picture.

See the tikz package documentation for explanation.
Type  H <return>  for immediate help.

but there is no log file in the folder I already created.

Answer 1

I solved reinstalling texlive, I noticed that typing in the cmd pdflatex.exe it didn't find anything. Now I have it working and the string I wrote in the question is the right one. It works even without the optimize=false.

pdflatex.exe -synctex=1 -interaction=nonstopmode --shell-escape %.tex