SAP Knowledge Base Article - Public

2955912 - [Custom MDF] Unable to add more custom fields inside a Custom MDF object definition


I am trying to add one custom field inside a custom MDF object definition but I am getting the following error message: You are adding too many NUMBER-typed fields (limit is 100). You cannot exceed this limit.

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.


  • SAP SuccessFactors HXM Suite
  • Metadata Framework (MDF)

Reproducing the Issue

  1. Go to Configure Object Definition;
  2. Open a definition of a custom MDF object;
  3. Start adding custom fields, and after adding 100, you try to add a new one and get the following error message:


In order to avoid performance issues, SAP SuccessFactors has determined some limits for the creation of custom fields inside of MDF objects. You can check what are these recommended numbers in our SAP Help Portal page.

This warning message will appear when 80% of the limit is reached, The limit is not on the total fields limit but it is applied to internal DB data type which is different from MDF data types.

To understand which MDF Data type is mapped to which DB type, please refer to: Custom Field Limits on Pre-delivered and Custom MDF Generic Objects | SAP Help Portal


In some cases, you will observe that the system will allow you to create more fields than these limits, or will show some messages alerting for the limit of custom fields, and each part of the system (Import MDF data, Configure Object Definition, etc) can show a different number in the message, but you should consider the limits that are set in the Help Portal page. In this case, we alert again that you are running a risk to have performance issues because of the amount of data on it. 

See Also

2438887 - Metadata Framework | How to create a custom field for a MDF Object?


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SAP SuccessFactors HXM Suite 2005