How To Fix AH887 - Device &1 register &2: not possible to convert &3 to &4

SAP Error Message - Details

• Message type: E = Error

• Message class: AH - IS-U billing (master data)

• Message number: 887

• Message text: Device &1 register &2: not possible to convert &3 to &4

What causes this issue?

Conversion of the measurement units is not possible. Due to technical
reasons, the error cannot be analyzed in dialog mode.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

If you are unable to localize the error directly, call the function
module CONVERSION_FACTOR_GET in the test environment (Transaction
<DS:TRAN.SE37>SE37</>) using the following parameters:
UNIT_IN = &V3&
UNIT_OUT = &V4&
This provides you with a more detailed analysis of the error.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AH887 - Device &1 register &2: not possible to convert &3 to &4 ?

  The SAP error message AH887 typically indicates an issue related to device registration and conversion of data types. This error can occur in various contexts, such as when dealing with output devices, spool requests, or data conversion processes in SAP.
  Cause:
  The error message AH887 occurs when there is an attempt to convert a data type that is not compatible with the expected type. The placeholders in the message (&1, &2, &3, &4) represent specific details about the device, the register, and the data types involved. Common causes include:
  
  Incompatible Data Types: The system is trying to convert a data type (e.g., string, integer) that does not match the expected type.
  Configuration Issues: There may be misconfigurations in the device settings or in the way the data is being processed.
  Missing or Incorrect Device Definitions: The output device may not be properly defined in the SAP system.
  Programming Errors: Custom code or enhancements may be attempting to perform an invalid conversion.
  
  Solution:
  To resolve the AH887 error, you can take the following steps:
  
  
  Check Device Configuration:
  
  Go to transaction SPAD (Spool Administration) and verify the configuration of the output device. Ensure that the device is correctly defined and that all necessary parameters are set.
  
  
  
  Review Data Types:
  
  Identify the data types involved in the conversion process. Ensure that the data being passed matches the expected types. You may need to adjust the data format or perform explicit conversions in your code.
  
  
  
  Debug Custom Code:
  
  If the error is occurring in custom ABAP code, use the debugger to trace the execution and identify where the conversion is failing. Look for any type mismatches or incorrect assumptions about data formats.
  
  
  
  Check Spool Requests:
  
  If the error is related to spool requests, check the status of the spool request and ensure that it is being processed correctly. You can use transaction SP01 to monitor spool requests.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes that may address this specific error message. SAP frequently updates its knowledge base with solutions for known issues.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP Support for assistance. Provide them with the error details and any relevant logs or traces.
  
  
  
  Related Information:
  
  Transaction Codes: SPAD (Spool Administration), SP01 (Spool Request Management)
  Data Types in ABAP: Familiarize yourself with the common data types in ABAP and how to perform conversions between them.
  SAP Documentation: Review SAP documentation related to output devices and spool processing for additional context and troubleshooting steps.
  
  By following these steps, you should be able to diagnose and resolve the AH887 error in your SAP system.