[ccp4bb] MrBump doesn't work (6.4.0 update)

[Eze Chivi]

Hello, I have a problem with the update 6.4.0 of ccp4: MrBump does not start, 
it freezes in the message "Please wait...drawing task window mrbump" and the 
error "expected integer but got """. Sometimes, MrBump starts, but drop-down 
menu doesn't work. Same problem in Linux or Windows versions.
Thank you
 
Ezequiel