Connector: Downloading file without known filename error for named image files
We are using pngs in our client database. All files in the database have filenames. What might be causing Mendix to throw an error "Connector: Downloading file without known filename." The error repeats 5-6 times in a row. We are using png files as recommended. Thank you for any insights on this. I have not been able to find any Mendix documentation on naming conventions (spaces or no spaces in a filename, for example).
That sounds like the FileDocument (or specialisation of FileDocument) object you are using doesn't have the Name attribute set for some of the images.
It may be worth setting a breakpoint or a Log Message just before any Download File action you have to record what the value of this field is. It would confirm if it really does have a Name or not.