Assertion and Type errors

[migleapa]

Hello,
I am using klusta's development version and for some of my datasets when I try to open up for manual cliustering using command line phy kwik-gui (filename).kwik I sometimes get either assertion or type errors. (Assertion errors are more frequent)
"An error has occurred (AssertionError):"
"An error has occurred (TypeError): object of type 'NoneType' has no len()"
As for the assertion error I don't get a printed message saying what's wrong exactly, so it is really hard to track it down. Half of my datasets are fine. So I am very confused.
Does anyone have any suggestions om how to solve it?
Thanks,
Migle

[archangelChak]

For me changing input file extension from .bin to .dat helped to solve assertion error

[guptadivyansh]

@archangelChak It's amazingly simple how well that worked! Thank you!