I am using ImageMiner-1.4.1 extension. When using the Local Feature Extractor is get this message: "ExpectedImagePlusGSIOObject but received ImagePlusBaseIOObject". Look the process below.
I think that indeed maybe there has been some kind of change between the versions. Check this workflow http://www.myexperiment.org/workflows/2324.html where Local Feature Extractor works fine. If this is not the way to use the Local Feature Extractor anymore that what could be a way, since there is not way actually to use this operator.