Two common issues can arise when N4 automatically converts logical blocks of type LANE to G type stack blocks:
Naming: If multiple LANE type logical blocks exist that starts with the same character, N4 applies the naming format B1C2 to all stack bins of the GRID block. For example, if there are two logical blocks called PARK1 and PARK2, N4 would name the stack bins of both blocks P01, P02, and so on. This leads to duplicate stack bin names, which N4 does not allow. See also Handle duplicate bin names when upgrading (on page 1).
Display: Because the N4 conversion process assumes a very small fixed length for the GRID block polygon, it can easily go unnoticed in the XPS yard plan view. Because by default N4 displays GRID block polygons in the bottom left corner of the yard, they often overlap with other yard blocks.
You can prevent these issues by making changes prior to upgrading, or you can fix them after the upgrade (for details, see Prepare conversion of LANE type logical blocks the Navis N4 Installation Guide), or you can fix them after the upgrade.
To fix the conversion of LANE type logical blocks after upgrading:
To resolve the naming issue, do one of the following:
Create a new yard model in Yard Editor.
Open the new yard model in the Yard Editor.
Import the yard.nyd file.
Define GRID type blocks manually, making sure the names do not collide.
Add other logical blocks.
Apply the yard model changes.
To resolve the display issue:
Open the yard model in Yard Editor.
Locate the stack block of type Straddle Grid in the bottom left corner and move it to a reasonable location.