Q: Biber and Sublime text I use Sublime since two years and also biber but after an update of Latextools biber do not run. I get the two warnings below (and many more because of the undefined cites): 
LaTeX Warning: There were undefined references.

Package biblatex Warning: Please (re)run Biber on the file:(biblatex)                Signalerzeugung(biblatex)                and rerun LaTeX afterwards.

The console show me this:
<module 'simpleBuilder' from 'C:\\Users\\Dominik\\AppData\\Roaming\\Sublime Text 3\\Packages\\LaTeXTools\\builders\\simpleBuilder.py'>
<class 'simpleBuilder.SimpleBuilder'>
2
Welcome to thread Thread-9
['pdflatex', '-interaction=nonstopmode', '-synctex=1', 'Signalerzeugung']
Finished normally
0
False True True
!TEX root = 'D:\\Dropbox\\Masterarbeit\\dokumentation\\signalerzeugung\\Signalerzeugung.tex'
Jump to:  191 24
Windows, Calling Sumatra

I reinstalled  the latextools and Miktex but the Problem still exist :-(

A: So, for future reference, this was answered on the LaTeXTools issue tracker.
To summarise, you have several options:


*

*Using the traditional builder, which uses texify: Create an environment variable called BIBTEX (Windows 10 or more generally) and set its value to "biber" or the path to your biber executable.

*Install latexmk and change the distro setting in your LaTeXTools settings to "texlive", which doesn't require that you have texlive installed.

*Create a custom builder based on the SimpleBuilder that invokes bibtex. For reference it might look something like this:
from pdfBuilder import PdfBuilder

import re

PDFLATEX = ["pdflatex", "-interaction=nonstopmode", "-synctex=1"]
BIBER = ["biber"]

CITATIONS_REGEX = re.compile(r"Warning: Citation `.+' on page \d+ undefined")

class BiberBuilder(PdfBuilder):
    def __init__(self, *args):
        super(BiberBuilder, self).__init__(*args)
        self.name = "Biber Builder"

    def commands(self):
        self.display("\n\nBiberBuilder: ")

        yield(PDFLATEX + [self.base_name], "Running pdflatex...")
        self.display("done.\n")

        if CITATIONS_REGEX.search(self.out):
            yield(BIBER + [self.base_name], "Running biber...")
            self.display("done.\n")

            yield(PDFLATEX + [self.base_name], "Running pdflatex...")
            self.display("done.\n")

            yield(PDFLATEX + [self.base_name], "Running pdflatex...")
            self.display("done.\n")

        if "Rerun to get cross-references right." in self.out:
            yield (PDFLATEX + [self.base_name], "Running pdflatex...")
            self.display("done.\n")

Save the builder to a file called biberBuilder.py in a folder underneath Sublime Packages directory (in Sublime select Preferences|Browse Packages...) and set the "builder_path" setting in your LaTeXTools settings to the relative path to the folder containing the builder, e.g. "User/LaTeXTools" and set the "builder" setting to "biber"
