# Vim-latexsuite bibliography completion does not work

I am using the following files:

test.tex:

\documentclass{article}
\usepackage{natbib}
\bibliographystyle{dinat}
\begin{document}
\citet{s}
\bibliography{test}
\end{document}


and test.bib:

@article{six,
title        = "The Six -- a Boring Number",
author       = "Name, Alice and Other, Bob",
journal      = "Journal for Testing Affairs",
year         = 2066,
volume       = 66,
number       = 6,
pages        = "66--666",
}
@article{seven,
title        = "The Seven -- an Interesting Number",
author       = "Name, Alice and Other, Bob",
journal      = "Journal for Testing Affairs",
year         = 2077,
volume       = 77,
number       = 7,
pages        = "77--777",
}


With these I try the following to get the bibliography autocompletion of vim-latexsuite to work: I place the coursor behind the s in \citet{s} and press [F9].

According to the manual I should now get a new editor pane with content along the lines of

Article [six]
"The Six -- a Boring Number"
Alice Name and Bob Other
In Journal for Testing Affairs, 2066

Article [seven]
"The Seven -- an Interesting Number"
Alice Name and Bob Other
In Journal for Testing Affairs, 2077


Here I should be able to e.g. filter the items by author or year.

Instead I get two new editor panes.

The first titled test.tex [+] containing

test.bib|1 col 1| @article{six,
test.bib|10 col 1| @article{seven,


what appears to be some sort of grep results.

The second editor panes is titled [QuickFix-Liste] :grep.exe -nH ____HIGHLY_IMPROBABLE____ test.tex and contains the contents of the file test.bib.

No filtering is possible and not the other navigation methods named in the manual.

How do I set up the citation completion properly?

I believe vim-latexsuite is set up correctly (i.e. I see the TeX-relatex menu items). I am working with gvim80 unter Windows 10, I have installed python 2.7 and GNU grep, both are in the path. The vimrc contains the line set grepprg=grep.exe\ -nH\ \$* as advised in the manual.

:echo has('python')

in vim where both resulted in 0, i.e. no python activated.
When I typed :python print("Hello World") I got an error saying that python27.dll could not be loaded what brought me to superuser.com. There I found that a 32bit vim is not compatible with a 64bit python or vice versa.