Hello, I am using Robotc 3.59 Beta and I am trying to save some numbers to the datalog. When I tried to use the addtodatalog command , it gave me an error. That same command used to work perfectly fine before I upgraded to 3.59. Any ideas how to make it work? Thank you!

The recent major changes to ROBOTC left some of the older commands and functions unusable; the AddToDatalog() function was unfortunately one of them. The good news is that ROBOTC still supports datalogging on the NXT via either the Debug Stream (http://www.robotc.net/wiki/Debug_Stream) or direct file access (http://www.robotc.net/wiki/NXT_Functions_File_Access). Either one of these can be used to store data on the NXT and access it on a computer.

The biggest difference between the two is that the Debug Stream sends the data straight to the PC while connected to the NXT (which can then be copied into another file, such as a spreadsheet) while the File Access commands create an actual file on the NXT brick, allowing it to store data even when it's not connect to a PC directly.