It's a file reader thread through a warning when "Data is larger than field length (delimited files only), forcing the Integration Service to truncate data". Please take a look on the file column size and max length of the column.
Sometimes, It will through the error when the file is saved other than Unicode mode. So please give some additional space and try.
Thank your for your answer.
Turns out it was my input file that was not correct so all my columns were out-of-sync with my target.
It works fine now.