How To Fix DH188 - Width & of parameter list is too big for personal help

SAP Error Message - Details

• Message type: E = Error

• Message class: DH - DD: Messages for search helps

• Message number: 188

• Message text: Width & of parameter list is too big for personal help

What causes this issue?

For technical reasons, the <LS>personal help</> function cannot be
offered for elementary search helps in which the total width of all the
<DS:TX.DDDOK_SHLP_PARAMETER>parameters</> is greater than &V2&. The
total width of all the parameters of the current search help is &V1&.
As a result, no personal help can be offered for it.

System Response

The action is continued. The personal help function does not offer
input helps that use the current search help.

How to fix this error?

Check if you really need all the parameters for the search help. If
necessary remove some parameters.

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 DH188 - Width & of parameter list is too big for personal help ?

  The SAP error message DH188, which states "Width & of parameter list is too big," typically occurs when the parameter list being passed to a function module or method exceeds the maximum allowed size. This can happen in various scenarios, such as when using function modules, RFC calls, or when dealing with large data structures.
  Cause:
  
  Exceeding Parameter Limits: The parameter list for a function module or method has a maximum size limit. If the combined width of all parameters exceeds this limit, the error will occur.
  Large Data Structures: If you are passing large internal tables or structures as parameters, they may exceed the allowed size.
  Incorrect Data Types: Sometimes, using incorrect or overly large data types can lead to this issue.
  
  Solution:
  
  
  Reduce Parameter Size: Review the parameters being passed to the function module or method. Try to reduce the size of the data being sent. This can be done by:
  
  Sending only the necessary fields instead of the entire structure.
  Breaking down large internal tables into smaller chunks and processing them in multiple calls.
  
  
  
  Use Table Parameters: If applicable, consider using table parameters instead of individual parameters. This can help manage the size more effectively.
  
  
  Check Data Types: Ensure that the data types used for the parameters are appropriate and not unnecessarily large.
  
  
  Refactor Code: If the function module or method is being called multiple times with large data, consider refactoring the code to minimize the number of calls or to aggregate data before passing it.
  
  
  Debugging: Use debugging tools to analyze the size of the parameter list being passed. This can help identify which specific parameters are contributing to the size issue.
  
  
  Related Information:
  
  SAP Documentation: Refer to the SAP documentation for the specific function module or method you are using to understand its parameter limits.
  SAP Notes: Check for any relevant SAP Notes that might address this issue or provide additional guidance.
  Performance Considerations: Keep in mind that passing large amounts of data can also impact performance, so optimizing data handling is beneficial beyond just resolving the error.
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.