Value Error: object not in sequence

[felixsc1]

When starting COSplay the following error message appears:

Error on pyboard:
Traceback (most recent call last):
  File "main.py", line 323, in <module>
  File "main.py", line 197, in main
ValueError: object not in sequence

Before the error appears, it successfully connects to the pyboard and also detects the sequence on it.

[felixsc1]

seemed to be that the problem was with the sequence file, not with the software itself.

[TheChymera]

This issue can commonly be caused if the sequence contains a leading column of indexes.