diff --git a/scripts/GtpV2StackCodeGen/README.txt b/scripts/GtpV2StackCodeGen/README.txt
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+Requirements:
+1.Python3.6.
+2.Install the template-toolkit package.
+	a. pip3 install Template-Toolkit-Python or 
+	b. git clone https://github.com/lmr/Template-Toolkit-Python, and set the path of the package in the datatypeCodeGen.py,groupedIECodeGen.py,iECodeGen.py,msgCodeGen.py,xlUtils.py script [as argument in sys.path.append]
+
+Inputs:
+	1 Excel file with 4 spreadsheets:
+		Message Modeling ,IE Modeling,Grouped IE Modeling and DataType Modeling: Defines the message structure,IEs,Grouped IEs and Datatype of IEs for the GTP classes to be generated . 
+Output:
+	1.	IE Classes .cpp and header files. 
+	2.	Message Classes .cpp and header files.
+	3.	gtpV2stack .cpp and header files
+	4.	MakeFile
+
+
+Remove all existing generated Files:
+-Use below commands:
+	rm ../../src/gtpV2Codec/ieClasses/*.cpp ../../src/gtpV2Codec/ieClasses/*.h;
+	rm ../../src/gtpV2Codec/msgClasses/*.cpp ../../src/gtpV2Codec/msgClasses/*.h;
+	rm ../../src/gtpV2Codec/Makefile;
+Execution:
+-Run the below command:
+	python3 startCodeGen.py
+
+
+
+