On a successful return, process_koc.pl displays something like this: 

Checked in TITLE (BARCODE) from PERSON (PATRONBARCODE): 

The date and time is supposed to be displayed after the trailing colon. 

On lines 276, 297, 318 and 344 the script tries to assign datetime to @output: 

datetime => $circ->{ 'datetime' }

but in the function parse_command_line on line 189 the timestamp from the .koc-file is split into $date, $time and $id, and date and time are returned seperately. 

A couple of solutions spring to mind: 

- Returning the timestamp from parse_command_line and assigning that to datetime in @output

- Concatenating date and time in the assignment to datetime. 

Not sure which makes most sense...