a "?" appears if a field is to small to show the entire text ( OR a specified calculation failed).
If this is the issue, goto Layout-Mode and drag the field to a larger width.
If I'm wrong on this, a screenshot of your solution could give some more informations.
To Benjamin Fehr: thanks for the suggestion but this does not work.
Is this a calculation field or a text field with an auto-enter calculation? If the latter, make sure that "do not replace existing value..." is not selected or inserting a file into the container field will not update the value returned.
And "Created" is listed in help only for Photos--digital pictures that happen to have the necessary meta-data encoded with the image file.
The file types you listed ((mp3, image of pdf) are not likely to have this metadata.
I am specifically talking about the "Date" field in the Content Management Startup solution which does not change when I insert a content in the "File Container" field of the Database, whatever the type of document it is.
Since I did not change anything, the "Date" field is a "Date" and the value is calculated as such:
created = GetContainerAttribute ( File Container ; "Created" ) ;
Created = "?" or IsEmpty ( Created ) ; Self ;
Having said this, I guess you're right. I've been looking at this video and the date does not change either. How does FileMaker's Content Management ... - YouTube
And are you using FileMaker PRO or FileMaker GO?
Your initial report is contradictory, reporting iOS--implying GO, but then specifying FileMaker Pro--which cannot be run or installed on an iOS device.
And have you tried inserting a digital photo such as a picture taken with your iOS device?
To repeat, from what I see in FileMaker help, the GetContainerAttribute function can extract a date only from a file that has the correct meta data recorded with it. The help entry only shows this working with a photo, not the image of a PDF nor an audio file.
The field, BTW, has two auto-enter settings. One enters the record's creation date when the record is first created. The second attempts to extract a date from an inserted file, but this is data that may not be available in all cases--even for a digital photo.
I am using FileMaker PRO (sorry for the iOs mention)
Again, you're right. Tried inserting a .jpg file. The date changed. All is well. I know now how to use the Date field.