I'm trying to import construction data from a file previously saved in a different project but I'm getting the following error:

The text file I'm trying to import looks like this:
- ID Category Description Data source U value (W/m²·K) Thickness (mm) Notes etc.
CLCEI Internal Ceiling/Floor Floor Generic 0.1382 1930.000
CLEXT External Window Single Glazed Sash Windows Generic 5.0909 4.000
CEXTW External Window External Glazed Door Generic 4.8254 4.000
CFLOO Ground/Exposed Floor Ground Floor Slab Generic 0.8235 1105.000
CFLOOR Ground/Exposed Floor Basement Floor Generic 1.3183 780.000
CLIPAR Internal Partition Internal Stone Wall Generic 1.0110 1200.000
CLIWAL External Wall Stone Walls Generic 1.1450 1220.000
Thanks in advance

