I have made some ES4 designer forms which have been working fine for years. They are being opened and filled out using Acrobat 2017.
All of a sudden one of the forms in particular has started coming up with a "Software Failure" error when being filled out.
After clicking ok, the form freezes and has to be closed down.
The error seems to be random and doesn't happen all the time, however does happen frequently enough to be a problem.
It was localised to one form, but has now started appearing here and there on other forms as well.
Does anyone know what causes this error or have any idea to find out what is causing it?