Thanks for testing and your reports! 
Seems to be some more work then…
The first error should be fixed.
Hm, I did not have any performance issues when loading the demo song. What kind of pc do you have?
Do you have more info about the undo collection? I have not heard of it.
Yes, this message appears if you are using a 32 bit compiled tool on 64 bit Renoise or vice versa. I had not compiled for 64 bit, sorry. I have added a version for 64 bit users now.
[quote=“Jonas, post:123, topic:29567”]
Hi Cie, when I first ran the stepsequencer, I got the regular interface. Then I closed the GUI. Created a new song, and loaded a sample, and started the script, and got:
*** std::logic_error: 'ViewBuilder: invalid index for popup: '3'. value must be [1 - 1].'
*** stack traceback:
*** [C]: in function 'popup'
*** gui.lua:1308: in function 'create_tracks_for_gui'
*** gui.lua:1822: in function 'create_gui_contents'
*** main.lua:67: in function <49><br>```
<br>
<br>
and the resultant gui looked like this:<br>
<img src="http://scene.org/~esa/renoise/stepseq_bug1.png"><br>[/quote]<br>
Should be fixed.<br>
The problem here was, that in 2.8 empty instrument slot names are not an empty string '' anymore, but nil.<br>
<br>
Please check out new beta 1.82 on first page. There may be some errors still...<br>
Edit: I am using 2.8 B5</49>