Dear Aditya Ranade.
When you manage the RE-FX module, RE-FX module need some Client side configuration
such as "Suppress Leading Zeros in Object Keys" or "Integrated Posting".
So, you can check whether use this configuration or not.
1) Suppress Leading Zeros in Object Keys (EHP5)
IMG > Master Data > Usage View > General Settings for Multiple Object Types
2) Integrated Posting
IMG > Accounting > Automatically Generated Accounting Documents > Allow Integrated Posting
p.s. When you go to T-Code SM30 and enter V_TIVCACLSET, you can see the client side
configuration items.
Regards,
yeong-chul.jeong