BibTeX, biblatex and biber ⇒ Undefined control sequence \ifprefchar

[doul]

Please, I am using the MastersDoctoralThesis template- Everything was going on well until I added more articles in the bibliography file (example.bib). Now, when I try to compile, it displays the following error message:


"! Undefined control sequence.
<argument> ...ibnameprefix {d.}\isdot \ifprefchar
{} {} {\ifuseprefix {\bibn...
l.375 \printbibliography[heading=bibintoc]"
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.¨

I tried to remove the added reference articles, but the error remains


Please help!




Please help!

[Johannes_B]

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