Error log for FM POST_DOCUMENT

Hi Experts,

I have used 'POST_DOCUMENT' FM for uploading recurring documents, but there is no return structure fot the FM.

Is there any way I can get the error log?

I read somewhere to use 'BAL_DSP_LOG_DISPLAY' for getting the log.

Please suggest what is the best solution to get the return messages, without which the implementation is futile.

Best Regards and thanks,

Sumit