Writing more than 16 analog input channels into a single file

[TomRizzo]

Unfortunately you can't.

What you can do, that is what we do, is to create a macro in Excel that woyls rename the channels everytime you import the file in it.

[CJ_Butler__DASYLab_Pro]

But you can individually name the channels!

At the bottom of the ASCII options settings there is the area where you specify a Global String to use as a channel name for each of the merged channels. 

Define each channel name (and unit) as a Global String, for example, String#1 is "Temperature (F)", and then assign that string number to channel 0.

It's tedious when you have many channels, but you only need to do the assignment once. If you need to change the channel name, you can do it in the Global String settings (Options menu).