I have the same problem (https://community.jaspersoft.com/questions/1194941/jasper-api-nested-subreports) I think jasper server embeds the subreports, amd jasperstudio dowsen't included nested subreport (from th 2 level). I have encountered this problem there since version 8, but i don't know how to do a workaraund, or where is my errors.. In the log I see java.lang.IllegalArgumentException: contextPath needs to be an absolute paththanks