A Dotnet Variable has not been Instantiated. Attempting to call - Dynamics NAV 2013/ NAV 2009

Hi,
A Dotnet Variable has not been Instantiated. Attempting to call, this error message will pop up when trying to call  a .Net Framework Assembly from CAL code.

when you calling a .Net Framework Assembly without constructor call  you will get above mentioned error message.

A constructor is a method that creates an instance of an object and prepares it for use. Before you use a DotNet variable, you should verify whether the variable is static or is an object instance because this determines whether you have to use a constructor.

• Static variables do not require a constructor because they do not have an instance.
  
• Object instance variables require a constructor because they must be created before they can be accessed.

Example Code with constructor Call from CAL code

Asmbly := Asmbly.ConverttoUppercase();                          // Constructor Call

ConvsertyedString := Asmbly.ConverttoUp('marshal');   // Method Call

MESSAGE(ConvsertyedString);

Name DataType               Subtype

Asmbly DotNet                        UpperCase.ConverttoUppercase.'UpperCase, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'

Marshal