Comparing Versions
Use a file comparison tool to compare the files that you created in the previous procedure and find and view details about the objects changed during the Microsoft Dynamics NAV 2013 upgrade. This process is easier if you split each of your three exported .txt files into collections of .txt files, with one object for each file.
As you compare the files, make a log of the differences and evaluate the changes that have been made.
Decide which changes from the old custom version you want to duplicate in Microsoft Dynamics NAV 2013. Some of the customizations may correspond to new functionality in Microsoft Dynamics NAV 2013. In such cases, you do not have to move the changes from the old custom version.
To make the evaluation easier, determine if there is any document that describes the changes that have been made in the old custom version. Object names or field names that would be duplicated because of the merge must be renamed. Function numbers and control numbers must be renumbered.
For more information about changes to the Microsoft Dynamics NAV coding infrastructure since Microsoft Dynamics NAV 2009, see the following topics:
Changes in C/AL Behavior and Support from Earlier Versions of Microsoft Dynamics NAV
Best Practices for Using Automation with the Microsoft Dynamics NAV Windows Client