Preparing the SAP Business Suite System
The code inspector checks within the context of an SAP S/4HANA conversion have to be performed in the evaluation system based on SAP NetWeaver 7.5.
Context
To check the custom code in your SAP Business Suite system, you have to install the Code Inspector Extractor, which then will be called from the evaluation system.
Procedure
[Optional] In your SAP Business Suite system, implement SAP note 2270689 
to install the Code Inspector Extractor.
to install the Code Inspector Extractor.