Biblatex not working with Winedt

Question

I'm trying to merge the three chapters of my PhD thesis using \subfile, and I want the .bib files to be added at the end of each chapter. I'm trying with only one .bib file first and it doesn't work, ie. the output doesn't take into account my input style=numeric and doesn't print any bibliography (it just prints \biblio_chap1 at the end of the document !).

\documentclass[a4paper]{book}
\usepackage[utf8]{inputenc}
\usepackage{subfiles}
\usepackage[backend=biber,style=numeric]{biblatex}
\addbibresource{/biblio_chap1.bib}

\title{PhD thesis}
\author{Anaïs}
\date{}

\begin{document}

\chapter*{Acknowledgements}\subfile{Acknowledgements}

\chapter*{Introduction}\subfile{Intro}

\chapter{Paper 1}\subfile{chapter_1}
\printbibliography{/biblio_chap1}

\end{document}

And here is a minimal code for the chapter_1:

\documentclass{subfiles}
\begin{document}
\section{Introduction}
(CCRIF, 2017)\cite{ccrif} GDP\footnotemark{GDP 2016}
\end{document}

and for the .bib file

@techreport{ccrif,
 title = {CCRIF SPC Annual Report 2016-2017},
 author = {},
 group = {Caribbean Catastrophe Risk Insurance Facility},
 year = {2017},
 institution = {CCRIF SPC},
 address = {},
 month = {}
}

I have changed the execution mode accordingly from bibtex.exe to biber.exe and I compile using PDFTeXify. The bibliography works fine in a separate article, with the \bibliography command.