Introduction
This article describes how to install a cumulative update for Microsoft Dynamics NAV 2018. You have to recompile all objects after you install a cumulative update.
A cumulative update is a cumulative set of files that includes all hotfixes and regulatory features that have been released for Microsoft Dynamics NAV 2018.
A cumulative update includes files that are separated into the following folders:
- 
              
APPLICATION
 - 
              
DVD
 
See Upgrading the Data to Microsoft Dynamics NAV 2018 for details.
How to install the cumulative update files
APPLICATION
The APPLICATION folder includes the following files:
- 
                  
AccumulatedChangeLog.<Locale>.<Build No.>.txt
 - 
                  
Changelog.<Locale>.<Build No.>.txt
 - 
                  
CUObjects.<Locale>.<Build No.>.fob
 - 
                  
Objects.<Locale>.Objects.<Locale>.<Build No.>.txt
 
To install the application files, follow these steps:
- 
                  
Unmodified databases:
- 
                      
Import the CUObjects.<Locale>.<Build No.>.fob file into an unmodified Microsoft Dynamics NAV 2018 database.
 - 
                      
Replace the existing objects in the database with the cumulative update objects.
 
For more information, see How to: Import Objects.
 - 
                      
 - 
                  
Modified databases or local databases for which local cumulative updates are not released:
- 
                      
Import the CUObjects.<Locale>.<Build No.>.fob file into the Import Worksheet window in your modified database.
For more information, see Import Worksheet.
 - 
                      
Replace the objects in your database that have NOT been modified.
 - 
                      
Use the CUObjects.<Locale>.<Build No.>.txt file to compare and merge the cumulative update objects with the objects in your database that have been modified.
 
Or, you may use the Changelog.<Locale>.<Build No.>.txt file to manually apply the changes to the objects in your database.
Note If a table in the cumulative update has a new field and the same table in your database has been modified, use the Merge: Existing<-New or the Merge: New<-Existing options in the Import Worksheet window to import the new fields. For more information, see Options for Merging Objects.
 - 
                      
 
Note about Regulatory Features If a license update is required for a regulatory feature, customers can download an updated license from CustomerSource and partners can download their customers' updated license from VOICE. For more information, see the following How To articles:
PLATFORM
The following components are defining the Microsoft Dynamics NAV Platform:
- 
                  
Microsoft Dynamics NAV Web Client
 - 
                  
Microsoft Dynamics NAV Windows Client
 - 
                  
Microsoft Dynamics NAV Service Tier
 
The Microsoft Dynamics NAV platform can be installed by the following methods:
- 
                  
Use the installation program
- 
                      
Un-install current client or server
 - 
                      
Open the DVD folder and run the setup.exe
 - 
                      
Connect to the database
 
Note This is a recommended method because different installations may have different strategies. For example, stx/etx file updates may not be included in a localized or Multilanguage setting.
 - 
                      
 - 
                  
Use the ClickOnceInstaller (Web Client and Windows Client only)
- 
                      
For more information, see Deploying Microsoft Dynamics NAV Using ClickOnce.
 
 -