Assigning a string variable to another string variable

[Christopher4187]

I'm so close I can smell it.

I'm using this to get my data:

DAT VAR byte[255]
UNIT1 VAR byte[255]
UNIT2 VAR byte[255]
UNIT3 VAR byte[255]
CMD VAR BYTE

HSERIN 1, COMPLETE_RX_TRANSFER,[wait ("&"),dec2 CMD, STR DAT\255\"#"]

This works well. The problem is, I want to filter the DAT data and then assign different string variables for the DAT. It looks like this:

SELECT CASE CMD
    CASE 80 
        UNIT1=DAT
        
    CASE 81 
        UNIT2=DAT
    CASE 83 
        UNIT3=DAT
END SELECT

The problem is that when I go to display the newly assigned variables I only get the first character. I've tried UNIT1=DAT\255 and that returns an error. What am I missing? I know I can just filter it with HSERIN but I thought it would make the program quicker if I used one HSERIN statement and then used select case to sort the data.