Carlson Alphanumeric: This native Carlson format allows letters in the point numbers, and the point name can be up to 10 characters. Any combination of letters and numbers is acceptable.
First thing you need to do is go to Carlson Configure/General Settings and make sure you have it set to Alphanumeric point format. Then, Set a new coordinate file, name it and then be sure to change the "files of type" at the bottom to a .mdb format. Then you can import a text/ascii file that contains points with longer point numbers. Let me know if you have any further questions. Thank you.