How to reuse local hidden files in other reports?

[tonyy]

Context : REST API ; JasperServers; JasperSoft Studio

Say I upload jrxml from jasperstudio to jasperserver. The server will generate hidden directory like reportname_files/ with resources inside .

Whenever I try to reference these resources from the reportUnits of other reports it tells me that:

 

  "message" : "The value "/reports/Coffee_files/main_jrxml" for parameter "resourceReference.uri" is invalid.",

My directory is correct that is I am sure ( 2 weeks on REST API ... trust me there is no mistake here, besides same directory works on the PUT update request for the original report which directory belongs to).