Warnings which are raised during the recognition task.

In general character recognition processes do not really either fail or succeed. It is true that sometimes they are more successful than others, that sometimes things run smoothly, that sometimes they hit problems. However it is quite normal to find that parts of a document can be recognized fairly well but that other parts are more troublesome.

In the event of an exceptional failure ABCpdf will indeed throw an exception. However if it simply hits some rough patches but manages to extract a useful amount of text then any problems will be reported via this property rather than via an exception.

None.