How To Fix R7B151 - Conversion exit &1 used: Length reduction not allowed

R7B151 - Overview

• Message type: E = Error

• Message class: R7B - BW Metadata (InfoCube, InfoObject, InfoObject catalog)

• Message number: 151

• Message text: Conversion exit &1 used: Length reduction not allowed

What causes this issue?

You have specified conversion exit &V1&. You have also changed the
internal length from &V2& to &V3&.

System Response

Activating the characteristic with these settings is not allowed.

How to fix this error?

Either remove this conversion exit, specify a different conversion exit
or make the internal length equal to or greater than &V2&.

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 R7B151 - Conversion exit &1 used: Length reduction not allowed ?

  The SAP error message R7B151 "Conversion exit &1 used: Length reduction not allowed" typically occurs when there is an attempt to convert a value from one data type to another, and the conversion exit being used is trying to reduce the length of the data. This is not allowed in SAP, as it can lead to data loss or corruption.
  
  Cause:
  
  Data Type Mismatch: The error often arises when there is a mismatch between the expected length of the data type and the actual length of the data being processed. For example, if a conversion exit is defined for a field that expects a certain length, but the input data exceeds that length, the system will throw this error.
  Improper Use of Conversion Exits: If a conversion exit is applied to a field that is not compatible with the data being passed, it can lead to this error.
  Field Length Definitions: The field definitions