How To Fix 01628 - Not possible to add further nodes

SAP Error Message - Details

• Message type: E = Error

• Message class: 01 -

• Message number: 628

• Message text: Not possible to add further nodes

What causes this issue?

You have expanded a hierarchy tree. It is essential that every new node
be assigned a unique key (used as an internal ID for the node). The
generation of a new key failed.

System Response

The program terminates.

How to fix this error?

Restarting the program may fix the problem. This problem only occurs if
a large number of node keys (>100000) have the same first 12
characters. If you have been using the program for a long time since
the last restart, the supply of available keys may have been used up.
New keys are available after restarting the program.
The likelihood that this error will occur is very low. If you do not
have an enormous number of almost identical entries in the hierarchy
tree, the error may be due to a program error.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 01628 - Not possible to add further nodes ?

  The SAP error message "01628 Not possible to add further nodes" typically occurs in the context of SAP's data modeling or reporting tools, such as when working with SAP BW (Business Warehouse) or SAP HANA. This error indicates that you have reached the limit for the number of nodes that can be added to a particular structure, such as a hierarchy or a data model.
  Cause:
  
  Node Limit Reached: Each hierarchy or data structure in SAP has a predefined limit on the number of nodes (or levels) that can be added. If you attempt to add more nodes than allowed, this error will be triggered.
  Configuration Settings: The system may have specific configuration settings that limit the number of nodes for performance or design reasons.
  Data Model Design: The design of the data model may not accommodate additional nodes due to its structure or relationships.
  
  Solution:
  
  Review Node Limits: Check the documentation or configuration settings for the specific SAP module you are using to understand the maximum number of nodes allowed. If you are at the limit, consider restructuring your data model or hierarchy.
  Optimize Hierarchy: If possible, optimize your hierarchy by consolidating nodes or removing unnecessary ones to make room for new nodes.
  Split Hierarchies: If your hierarchy is too large, consider splitting it into multiple hierarchies or levels to manage the data more effectively.
  Consult SAP Notes: Look for relevant SAP Notes or updates that may address this issue or provide guidance on how to manage node limits.
  Contact SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance. They may provide insights specific to your version or configuration.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for the specific module you are using (e.g., SAP BW, SAP HANA) for detailed information on node limits and best practices for data modeling.
  Community Forums: Check SAP community forums or user groups for discussions related to this error. Other users may have encountered similar issues and can provide solutions or workarounds.
  Performance Considerations: Keep in mind that having too many nodes can impact performance. It's essential to balance the need for detailed data representation with system performance.
  
  By following these steps, you should be able to address the "01628 Not possible to add further nodes" error in SAP.