REP-1219 error 'object ' has no size

Most of the times you face the error, you generally delete the object.
However, the following forum posting
This error occurs when you create a report in bitmap mode and run it as a character report.

Solution is as below:
Open reports builder and the rdf file which is giving error

1. Go to FILE -> ADMINISTRATION -> CONVERT
2. A dialog box will popup.
3. In OPTIONS tab
select DESTINATION UNIT as CHARACTER
select OVERWRITE as NEWNAME
4. Then in CONVERSION tab select
Document Type : Report
Source Type : rdf
Source : It is the file for which you are getting error
Destination Type : rdf
Destination : give the location and filename for the destination file
3. Then click on OK
Reopen the rdf file, the error is no longer reported.