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-rw-r--r--Master/texmf-dist/tex/latex/xsim/xsim.random.code.tex12
1 files changed, 11 insertions, 1 deletions
diff --git a/Master/texmf-dist/tex/latex/xsim/xsim.random.code.tex b/Master/texmf-dist/tex/latex/xsim/xsim.random.code.tex
index 0730d04d454..e8bddf2a10d 100644
--- a/Master/texmf-dist/tex/latex/xsim/xsim.random.code.tex
+++ b/Master/texmf-dist/tex/latex/xsim/xsim.random.code.tex
@@ -8,7 +8,7 @@
% Web: https://github.com/cgnieder/xsim
% E-Mail: contact@mychemistry.eu
% ----------------------------------------------------------------------------
-% Copyright 2017 Clemens Niederberger
+% Copyright 2017--2018 Clemens Niederberger
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3
@@ -27,6 +27,16 @@
% ----------------------------------------------------------------------------
\XSIMmodule{random}{randomly select exercises from collections}
+\msg_new:nnn {xsim} {random-numbers-unavailable}
+ {
+ You~ are~ compiling~ your~ document~ using ~XeLaTeX.~ Please~ be~ aware~
+ that~ random~ selection~ of~ exercises~ is~ unavailable~ in~ XeLaTeX.~ If~
+ you~ use~ this~ feature~ you~ can~ safely~ ignore~ this~ message.
+ }
+
+\sys_if_engine_xetex:T
+ { \msg_warning:nn {xsim} {random-numbers-unavailable} }
+
\xsim_load_modules:n {collections}
\tl_new:N \l_xsim_random_collection_tl