For many reasons, the flatfile decoding/loading against the table definition can fail. To help, you could add 'ebcdicCsvDumpFolder' property into the EBCDIC loading step: ebcdicCsvDumpFolder=data/Debug
It enables to declare a folder into which a CSV file is created corresponding to the stream pass through the COPY or INSERT statement of the database. It enables to check eventual mistake.
A log file is also created, indicating how the ebcdic file has been cut out to fill each column.
Example:
Flat file
<debug>.csv file
cut off log file