7 files changed, 19 insertions, 16 deletions
diff --git a/Master/texmf-dist/doc/latex/xsim/HISTORY b/Master/texmf-dist/doc/latex/xsim/HISTORY
index c898ca033c0..83eaeb2efd6 100644
--- a/Master/texmf-dist/doc/latex/xsim/HISTORY
+++ b/Master/texmf-dist/doc/latex/xsim/HISTORY
@@ -178,3 +178,4 @@ HISTORY:
                    - various small fixes
  v0.20a 2021/02/01 - re-add missing `layouts' style
                    - add example texsx-549540
+ v0.20b 2021/02/02 - fix issue #78
diff --git a/Master/texmf-dist/doc/latex/xsim/README b/Master/texmf-dist/doc/latex/xsim/README
index 82ac42689c0..0bca910fa06 100644
--- a/Master/texmf-dist/doc/latex/xsim/README
+++ b/Master/texmf-dist/doc/latex/xsim/README
@@ -1,5 +1,5 @@
 --------------------------------------------------------------------------
-XSIM     2021/02/01 v0.20a
+XSIM     2021/02/02 v0.20b
 XSIMVERB 2021/01/31 v0.3
 
   eXercise Sheets IMproved
diff --git a/Master/texmf-dist/doc/latex/xsim/xsim-manual.pdf b/Master/texmf-dist/doc/latex/xsim/xsim-manual.pdf
index f78f19be587..02803ce557a 100644
--- a/Master/texmf-dist/doc/latex/xsim/xsim-manual.pdf
+++ b/Master/texmf-dist/doc/latex/xsim/xsim-manual.pdf
diff --git a/Master/texmf-dist/doc/latex/xsim/xsim-manual.tex b/Master/texmf-dist/doc/latex/xsim/xsim-manual.tex
index 329f602acf5..00ad03acc8d 100644
--- a/Master/texmf-dist/doc/latex/xsim/xsim-manual.tex
+++ b/Master/texmf-dist/doc/latex/xsim/xsim-manual.tex
@@ -1397,7 +1397,7 @@ yourself in order to achieve certain layouts\footnote{I plan to incorporate
   \expandable\command{IfExercisePropertyExist\TF}[\marg{property}\marg{true}%
   \marg{false}]
     Tests wether an exercise property with the name \meta{property} is defined.
-  \command{IfExercisePropertySet\TF}[\marg{property}\marg{true}\marg{false}]
+  \expandable\command{IfExercisePropertySet\TF}[\marg{property}\marg{true}\marg{false}]
     Tests wether the exercise property \meta{property} has been set for the
     current exercise.
   \expandable\command{GetExerciseProperty}[\marg{property}]
diff --git a/Master/texmf-dist/tex/latex/xsim/xsim-manual.cls b/Master/texmf-dist/tex/latex/xsim/xsim-manual.cls
index 600a7f60eb9..f67e2754aea 100644
--- a/Master/texmf-dist/tex/latex/xsim/xsim-manual.cls
+++ b/Master/texmf-dist/tex/latex/xsim/xsim-manual.cls
@@ -997,6 +997,7 @@
 \xsim@add@version{0.19b} {2020-04-04}
 \xsim@add@version{0.20}  {2021-01-31}
 \xsim@add@version{0.20a} {2021-02-01}
+\xsim@add@version{0.20b} {2021-02-02}
 
 % ----------------------------------------------------------------------------
 \newrobustcmd*\xsimauxfileinfo{%
diff --git a/Master/texmf-dist/tex/latex/xsim/xsim.sty b/Master/texmf-dist/tex/latex/xsim/xsim.sty
index e1953059a7b..157fd3eb82f 100644
--- a/Master/texmf-dist/tex/latex/xsim/xsim.sty
+++ b/Master/texmf-dist/tex/latex/xsim/xsim.sty
@@ -29,10 +29,10 @@
 
 \ExplSyntaxOn
 
-\tl_const:Nn \c_xsim_date_tl                 {2021/02/01}
+\tl_const:Nn \c_xsim_date_tl                 {2021/02/02}
 \tl_const:Nn \c_xsim_version_major_number_tl {0}
 \tl_const:Nn \c_xsim_version_minor_number_tl {20}
-\tl_const:Nn \c_xsim_version_subrelease_tl   {a}
+\tl_const:Nn \c_xsim_version_subrelease_tl   {b}
 \tl_const:Nx \c_xsim_version_number_tl
   {
     \c_xsim_version_major_number_tl .
@@ -2485,6 +2485,7 @@
       { \prg_return_true: }
       { \prg_return_false: }
   }
+\prg_generate_conditional_variant:Nnn \xsim_if_parameter_set:nn {o} {T,F,TF}
 
 % ----------------------------------------------------------------------------
 
@@ -4625,13 +4626,13 @@
 \NewExpandableDocumentCommand \IfExercisePropertyExistF {+m+m}
   { \IfExercisePropertyExistTF {#1} {} {#2} }
 
-\NewDocumentCommand \IfExercisePropertySetTF {m+m+m}
+\NewExpandableDocumentCommand \IfExercisePropertySetTF {m+m+m}
   { \xsim_if_property_set:eenTF {\ExerciseType} {\ExerciseID} {#1} {#2} {#3} }
 
-\NewDocumentCommand \IfExercisePropertySetT {m+m}
+\NewExpandableDocumentCommand \IfExercisePropertySetT {m+m}
   { \IfExercisePropertySetTF {#1} {#2} {} }
 
-\NewDocumentCommand \IfExercisePropertySetF {m+m}
+\NewExpandableDocumentCommand \IfExercisePropertySetF {m+m}
   { \IfExercisePropertySetTF {#1} {} {#2} }
 
 \NewExpandableDocumentCommand \GetExerciseProperty {m}
@@ -4733,22 +4734,22 @@
   { \xsim_input:oon { \ExerciseType } { \ExerciseID } {#1} }
   
 \NewExpandableDocumentCommand \IfExerciseParameterSetTF {+m+m+m}
-  { \xsim_if_parameter_set:nnTF {\ExerciseType} {#1} {#2} {#3} }
+  { \xsim_if_parameter_set:onTF {\ExerciseType} {#1} {#2} {#3} }
 
 \NewExpandableDocumentCommand \IfExerciseParameterSetT {+m+m}
-  { \IfExerciseParameterSetTF {#1} {#2} {} }
+  { \xsim_if_parameter_set:onT {\ExerciseType} {#1} {#2} }
 
 \NewExpandableDocumentCommand \IfExerciseParameterSetF {+m+m}
-  { \IfExerciseParameterSetTF {#1} {} {#2} }
+  { \xsim_if_parameter_set:onF {\ExerciseType} {#1} {#2} }
 
 \NewExpandableDocumentCommand \ExerciseParameterIfSetTF {+m+m+m+m}
   { \xsim_if_parameter_set:nnTF {#1} {#2} {#3} {#4} }
 
 \NewExpandableDocumentCommand \ExerciseParameterIfSetT {+m+m+m}
-  { \ExerciseParameterIfSetTF {#1} {#2} {#3} {} }
+  { \xsim_if_parameter_set:nnT {#1} {#2} {#3} }
 
 \NewExpandableDocumentCommand \ExerciseParameterIfSetF {+m+m+m}
-  { \ExerciseParameterIfSetTF {#1} {#2} {} {#3} }
+  { \xsim_if_parameter_set:nnF {#1} {#2} {#3} }
 
 \NewDocumentCommand \GetExerciseParameterTF {m+m+m}
   { \xsim_get_parameter_if_set:onTF {\ExerciseType} {#1} {#2} {#3} }
diff --git a/Master/texmf-dist/tex/latex/xsim/xsim.style.layouts.code.tex b/Master/texmf-dist/tex/latex/xsim/xsim.style.layouts.code.tex
index 31f5810bce5..778ad66eb0a 100644
--- a/Master/texmf-dist/tex/latex/xsim/xsim.style.layouts.code.tex
+++ b/Master/texmf-dist/tex/latex/xsim/xsim.style.layouts.code.tex
@@ -11,12 +11,12 @@
 % Copyright 2017--2020 Clemens Niederberger
 % 
 % This work may be distributed and/or modified under the
-% conditions of the LaTeX Project Public License, either version 1.3
+% conditions of the LaTeX Project Public License, either version 1.3c
 % of this license or (at your option) any later version.
 % The latest version of this license is in
 %   http://www.latex-project.org/lppl.txt
-% and version 1.3 or later is part of all distributions of LaTeX
-% version 2005/12/01 or later.
+% and version 1.3c or later is part of all distributions of LaTeX
+% version 2008/05/04 or later.
 % 
 % This work has the LPPL maintenance status `maintained'.
 % 
@@ -25,7 +25,7 @@
 % If you have any ideas, questions, suggestions or bugs to report, please
 % feel free to contact me.
 % ----------------------------------------------------------------------------
-\xsimstyle{layouts}[2019/10/12]
+\xsimstyle{layouts}[2021/02/02]
 
 \RequirePackage{needspace}