How To Fix SDDL_PARSER_MSG520 - Lower limit of cardinality cannot be greater than 1

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 520

• Message text: Lower limit of cardinality cannot be greater than 1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG520 - Lower limit of cardinality cannot be greater than 1 ?

  The SAP error message SDDL_PARSER_MSG520 indicates that there is an issue with the cardinality settings in a data model or configuration, specifically that the lower limit of cardinality cannot be greater than 1. This typically occurs in scenarios involving data modeling, such as when defining relationships between entities in SAP systems, particularly in SAP BW (Business Warehouse) or SAP HANA.
  Cause:
  The error arises when the cardinality settings for a relationship between two entities (like InfoObjects, tables, or data models) are incorrectly defined. Cardinality defines the number of instances of one entity that can or must be associated with instances of another entity. The lower limit of cardinality should logically be less than or equal to the upper limit. For example, if you set the lower limit to 2, it implies that at least two instances of the entity must exist, which contradicts the definition of cardinality.
  Solution:
  To resolve this error, you need to check and correct the cardinality settings in your data model or configuration. Here are the steps you can follow:
  
  
  Identify the Data Model: Determine which data model or configuration is causing the error. This could be in a BW InfoObject, a HANA model, or another related configuration.
  
  
  Check Cardinality Settings: 
  
  Open the relevant data model or configuration in the SAP GUI or the appropriate modeling tool.
  Locate the relationship or association that is causing the issue.
  Review the cardinality settings for both the lower and upper limits.
  
  
  
  Adjust the Cardinality: 
  
  Ensure that the lower limit of cardinality is set to a value that is less than or equal to the upper limit. For example, if the upper limit is set to 1, the lower limit should be set to 0 or 1.
  If the relationship should allow for multiple instances, adjust the limits accordingly (e.g., lower limit = 0, upper limit = N).
  
  
  
  Validate Changes: After making the adjustments, validate the data model or configuration to ensure that there are no further errors.
  
  
  Test the Configuration: Once the changes are made, test the configuration to ensure that it behaves as expected without triggering the error.
  
  
  Related Information:
  
  
  Cardinality Definitions: Understanding cardinality is crucial in data modeling. Common cardinality types include:
  
  One-to-One (1:1): Each instance of entity A is related to one instance of entity B.
  One-to-Many (1:N): Each instance of entity A can relate to multiple instances of entity B.
  Many-to-One (N:1): Multiple instances of entity A can relate to one instance of entity B.
  Many-to-Many (N:M): Multiple instances of entity A can relate to multiple instances of entity B.
  
  
  
  Documentation: Refer to SAP documentation or help resources for specific guidelines on cardinality settings in the context of your SAP application.
  
  
  SAP Community: If you continue to face issues, consider reaching out to the SAP Community forums or support for additional assistance.
  
  
  By following these steps, you should be able to resolve the SDDL_PARSER_MSG520 error and ensure that your data model is correctly configured.