sounds like your wires are crossed somewhere, probably with object names inside of your popovers.
Try using the script debugger to step through your button scripts and see exactly where it's going wrong.
Incidentally, a wonderful free tool called FMXraySpecs could help you identify objects with duplicate names on your layout.
Thanks, yes. Some object confusion. I'm just undertaking a new project with FM14 and had never really used popovers before. Thank you for the link. I will explore that happily.
Sure thing, he also offers FMXrayTables which does the same thing on schema. And also hinted in the near future having a tool for scripts as well.