I am using the PHP client, trying to upload subreports to an existing report. I have a report at '/Reports/MyReport', so I tried to use $c->repositoryService()->createFileResource($file, $content, '/Reports/MyReport_files/subreport.jrxml')[/code]to upload it to the hidden _files directory each report unit has. This works - if I try to upload the file again, it says the file already exists. But it doesn't actually make it part of the report unit. How do I use the PHP client to upload a subreport to an existing report unit, and make it part of the report unit?