I have inherited some code that imports data from various formats, one being type ".big". The only clues I have about this file type is that a program to create a ".big" file has to be run if there are more than 60,000 records in a .txt file. It create a table that has two fields, line number and line contents, and using low level calls, fills the table with the contents of the .txt file. Is there a limit to the file size ALines() can use?