I've just opened one of my 2016.1 Workspaces that reads a ShapeFile in 2017.0 and some ArcSDE layers and writes to 2 File Geodatabases (FGDBs). I got the following message in the translation log:
Attribute type 'fme_char' not found in ATTR_TYPE_MAP. Trying 'fme_int8'
Attribute type 'fme_int8' not found in ATTR_TYPE_MAP. Trying 'fme_int16'
I've still got 2016.1 installed so I'll run the Workspace in that, but I'd appreciate any explanations of what this means. I'll try re-creating the Readers and Writes in 2017.0 when I get a chance.