Cannot read design file

[lconcha]

Hello.

I am trying out LIPSIA for the first time, but cannot reproduce the examples for vlisa_prewhitening. I get the following error:

$ vlisa_prewhitening -col1 true -in filtered_func_data.v -design desing.txt -contrast 0 1 0   -out result.v

vlisa_prewhitening V3.1.0
 using 8 cores
   0:  filtered_func_data.v
   0:  desing.txt
vlisa_prewhitening: Fatal:  error opening design file desing.txt.

$ cat design.txt 
% Example 1
% event     onset      duration   amplitude
    1       18.00        3.00        1.00
    1      150.00        3.00        1.00
    1      168.00        2.00        1.00
    2       24.00        1.00        1.00
    2       90.00        1.00        1.00

I have tried formatting the design.txt file in many ways, but even the example included in the documentation fails. I have tried python 2.7 and 3.6. lipsia was installed from source. Ubuntu 18.04.

Thank you.

Luis