How to set groups

[242652354]

Traceback (most recent call last):
File "/home/mole07/workspace/chongcexu/twisst/twisst.py", line 546, in
assert len(args.group) >= 4, "Please specify at least four groups."
AssertionError: Please specify at least four groups.

This is what I set up groups.tsv.
HS5 A
HS5 A
HS5 A
HS5 A
XH1 B
XH1 B
XH1 B
XH1 B
JT10 C
JT10 C
JT10 C
JT10 C
DH1 D
DH1 D
DH1 D
DH1 D
I don't know what went wrong. Ask for help.

[simonhmartin]

I'm sorry I missed this question. I think the issue is that, in addition to providing the groups file, you need to provide the group names to use on the command line like -g A g B -g C -g D. Did you do that?