How To Fix /PM0/ABP_MESSAGES166 - Error during check of maximum cardinality; see long text for details

/PM0/ABP_MESSAGES166 - Overview

• Message type: E = Error

• Message class: /PM0/ABP_MESSAGES -

• Message number: 166

• Message text: Error during check of maximum cardinality; see long text for details

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PM0/ABP_MESSAGES166 - Error during check of maximum cardinality; see long text for details ?

  The SAP error message /PM0/ABP_MESSAGES166 typically indicates an issue related to the maximum cardinality check in the context of SAP's Advanced Business Application Programming (ABAP) or a specific module that deals with data modeling or configuration. This error often arises when the system detects that the number of instances of a certain entity exceeds the defined maximum cardinality constraints.
  
  Cause:
  
  
  Data Model Constraints: The error usually occurs when the data being processed violates the defined maximum cardinality constraints in the data model. For example, if a relationship is defined to allow a maximum of one instance (1:1) and the system is trying to create or process multiple instances, this error will be triggered.
  
  
  
  Configuration Issues: There may be misconfigurations in the settings of the relevant module or application that define how many instances of a particular entity can exist.
  
  
  Data Integrity Issues: There could be existing data in the system that violates the cardinality