latex is passing now.

Author: Ducasse

Chapters/Expressions/Expressions.md

@@ -380,7 +380,7 @@ What are the solutions?
 ### Introducing the Expression class
 
 
-![Introducing a common superclass.  %width=70&anchor=figExpressionHiera](figures/ExpressionsHierarchy.pngr)
+![Introducing a common superclass.  %width=70&anchor=figExpressionHiera](figures/ExpressionsHierarchy.png)
 
 Let us introduce a new class to obtain the situation depicted by Figure *@figExpressionHierar@*. 
 We can simply do it by adding a new class:

index.md

@@ -12,7 +12,7 @@
 
 % !!Playing with Joe the box
 
-<!inputFile|path=Chapters/Counter/Counter.md!>
+<!inputFile|path=Chapters/NewCounterMaterial/Exo-Counter.md!>
 <!inputFile|path=Chapters/Tests/Tests.md!>
 <!inputFile|path=Chapters/Katas/GramKatas.md!>