https://userapps.support.sap.com/sap/support/knowledge/en/3625799
3625799 - Error T_FV_6265: FIWTIN_QRETURNS File Rejected by NSDL FVU Tool | SAP Knowledge Base...
The FIWTIN_QRETURNS generated text file is rejected by NSDL due to Error T_FV_6265. This error occurs when uploading the text file to the NSDL FVU Tool.