May I know what datatype is that? I don't remember the error, will try again and let you know.

Chan,You cannot use nullable Foreign keys in ACS, I have tested it just now and It is creating NOT NULL fields every time. I think you can use 0 as default value when it is created instead of null. Thanks!

Also You can validate by querying the results from the resource using a workflow, if you see the data then it should be resource screen definition issue or could be something like what John said above. Thanks!

Hi Chaitanya,I think you can see the data from event context(ctx)-