How To Fix 34428 - Number of constraint calls in loop: &1 &2 &3 &4

SAP Error Message - Details

• Message type: E = Error

• Message class: 34 - Messages for Sales Configuration Engine (SCE)

• Message number: 428

• Message text: Number of constraint calls in loop: &1 &2 &3 &4

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 34428 - Number of constraint calls in loop: &1 &2 &3 &4 ?

  The SAP error message 34428, which states "Number of constraint calls in loop: &1 &2 &3 &4," typically occurs in the context of SAP's Advanced Planning and Optimization (APO) or similar planning applications. This error indicates that there is an issue with the number of constraint calls being made in a loop during the planning process. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Excessive Constraint Calls: The error usually arises when the system detects that the number of constraint calls exceeds a predefined limit during the execution of a planning run. This can happen due to complex planning scenarios or inefficient constraint definitions.
  Inefficient Planning Model: If the planning model is not optimized, it may lead to excessive iterations and calls to constraints, causing the system to hit the limit.
  Data Volume: Large volumes of data being processed can also contribute to this issue, especially if the constraints are not well-defined or if there are too many constraints being evaluated.
  
  Solutions:
  
  Review Constraints: Analyze the constraints defined in your planning model. Simplifying or optimizing these constraints can help reduce the number of calls made during the planning run.
  Adjust Configuration: Check the configuration settings related to constraint handling in your planning application. There may be parameters that can be adjusted to allow for more constraint calls if necessary.
  Optimize Planning Runs: If possible, break down large planning runs into smaller, more manageable ones. This can help reduce the load on the system and the number of constraint calls made in a single run.
  Check for Loops: Ensure that there are no unintended loops in your planning logic that could be causing excessive constraint evaluations.
  Consult SAP Notes: Look for any relevant SAP Notes or updates that may address this specific error. SAP frequently releases patches and updates that can resolve known issues.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for APO or the specific module you are using to understand the constraints and their configurations better.
  Performance Monitoring: Use SAP's performance monitoring tools to analyze the planning runs and identify bottlenecks or areas where the number of constraint calls can be reduced.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered similar issues and can provide insights or solutions.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.