Record cannot be modified in this window because it is already being modified in another window
I use Filemaker Go on an Ipad mini Retina and get the above-named error message* randomly. Despite the fact that I activated the options "override ESS locking conflicts" and "skip data entry validation", the error still occurs.
Wipe (and thus terminate) all active Apps resolves the problem temporary.
(*I had to translate the message from my native language, it may therefore differ slightly.)