Is it possible to add a standalone table to a file geodatabase?
This feature is not supported at the moment. We have logged a new feature request against it as GISNET-227 in our issue tracking system. We will update you here as soon as additional information is available.
Can you please share the format of the table that you are trying to add to the GDB file? Is it a GDB table(table stored in the FileGDB database) or is it some other table format?
It is a GDB Table - stored in the FileGDB database.