diff --git a/JsonPreprocessor/JsonPreprocessor.pdf b/JsonPreprocessor/JsonPreprocessor.pdf
index 824c13b5..dedf3330 100644
Binary files a/JsonPreprocessor/JsonPreprocessor.pdf and b/JsonPreprocessor/JsonPreprocessor.pdf differ
diff --git a/config/repository_config.json b/config/repository_config.json
index d99637f9..5296d254 100644
--- a/config/repository_config.json
+++ b/config/repository_config.json
@@ -13,7 +13,7 @@
    "DEVELOPMENTSTATUS" : "Development Status :: 4 - Beta",
    "INTENDEDAUDIENCE" : "Intended Audience :: Developers",
    "TOPIC" : "Topic :: Software Development",
-   "INSTALLREQUIRES" : [],
+   "INSTALLREQUIRES" : ["pydotdict"],
    "PACKAGEDATA" : ["*.pdf"],
    "PACKAGEDOC" : "./packagedoc"
 }
diff --git a/packagedoc/additional_docs/The JSONP format.tex b/packagedoc/additional_docs/The JSONP format.tex
index c33f334b..c5f74fd9 100644
--- a/packagedoc/additional_docs/The JSONP format.tex	
+++ b/packagedoc/additional_docs/The JSONP format.tex	
@@ -603,7 +603,7 @@ \section{Overwrite parameters}\label{overwrite-parameters}
 
 \vspace{2ex}
 
-Using composite data types inside strings causes errors:
+Using composite data types inside strings is not supported:
 
 \begin{pythoncode}
 "newparam6" : "prefix_${listval}_suffix"
@@ -615,10 +615,18 @@ \section{Overwrite parameters}\label{overwrite-parameters}
 "newparam7" : "prefix_${dictval}_suffix"
 \end{pythoncode}
 
-\textbf{TODO:} \href{https://github.com/test-fullautomation/python-jsonpreprocessor/issues/249}{Parameter substitution needs to be limited}
+\vspace{2ex}
+
+Result for \pcode{"newparam6"}:
 
 \vspace{2ex}
 
+\begin{pythonlog}
+The substitution of parameter '${listval}' inside the string value 'prefix_${listval}_suffix' is not supported! Composite data types like lists and dictionaries cannot be substituted inside strings.
+\end{pythonlog}
+
+\newpage
+
 \textbf{Value of a single element of a parameter of nested data type}
 
 To access an element of a list and a key of a dictionary, we change the content of file \plog{componentB.2.jsonp} to:
@@ -998,7 +1006,7 @@ \section{Dynamic key names}
 \end{pythoncode}
 
 The value of \pcode{newparam1} is defined by an expression that is encapsulated in quotes and contains - beneath hard coded parts - a dollar operator expression
-that is the dynamic part.
+(that is the dynamic part).
 
 The same is also possible on the left hand side of the colon. In this case the name of a parameter is created dynamically.
 
@@ -1040,7 +1048,7 @@ \section{Dynamic key names}
 
 \vspace{2ex}
 
-This will not work:
+This will not work (because of a key with name \pcode{A_2} does not yet exist):
 
 \vspace{2ex}
 
@@ -1054,7 +1062,7 @@ \section{Dynamic key names}
 \textbf{Outcome:}
 
 \begin{pythonlog}
-<TODO: error message>
+A substitution in key names is not allowed! Please update the key name "${strval}_2"
 \end{pythonlog}