Migration Guide : Planning the Upgrade : Upgrade Considerations for OpenROAD Releases : Upgrading from Release 3.5
 
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Upgrading from Release 3.5
To upgrade from OpenROAD 3.5, you must set up a separate environment for OpenROAD 6.2. You must consider the following:
Migration of 4GL applications
Migration of 3GL libraries
Whether the 4GL applications need to work in a UTF8/Unicode environment
Differences between the Ingres version used by OpenROAD 3.5 and OpenROAD 6.2.
For complete instructions about how to upgrade from OpenROAD 3.5, see Upgrading from OpenROAD 3.5.