I ran beta5f from a new folder, so no old bins. I also tried using a bin file made by beta5f with old beta and got the same error.
Just found a "bug" in the code. I guess you are not using "-w 256", right?
in file kernel/x22i.cl, line 1115, change "256" to "WORKSIZE" may solve your problem.
Yes, I usually use -w 128. Can you copy the whole line here please so I can search for it and edit? I use notepad to edit stuff lol, so no line numbers there.
Tried using -w 256. It works but I get 1.4 mhs, same hashrate as in beta5e++