How To Fix TT400 - Specify a valid application

TT400 - Overview

• Message type: E = Error

• Message class: TT - Extended Computer Aided Test Tool (eCATT) messages

• Message number: 400

• Message text: Specify a valid application

What causes this issue?

An invalid application was specified.

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?

Enter one of the following applications:
RW, RL, FI, CO, AM, PS, LX, MM, PM, PP, PS, QM, SD, HR, ...

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TT400 - Specify a valid application ?

  The SAP error message TT400 "Specify a valid application" typically occurs when there is an issue with the application configuration or when the system is unable to identify the application you are trying to access or use. This error can arise in various contexts, such as during the execution of a transaction, report, or when trying to access a specific application within the SAP system.
  Causes:
  
  Incorrect Application Code: The application code or transaction code you are trying to access may be incorrect or does not exist in the system.
  Authorization Issues: The user may not have the necessary authorizations to access the specified application.
  
  Configuration Issues: The application may not be properly configured in the system, leading to it being unrecognized.
  Missing or Inactive Application: The application might not be installed or could be inactive in the system.
  System Errors: There could be underlying system issues or bugs that are causing the application to be