You probably converted the reports from Crystal Reports because in Crystal Reports, the @ is the start of the parameter name. For subreport to work, it can not reside...

The special char @ can not appear in the name of subreport. It can not be used in the variable names as well.

In addition to rpttordl, I tried CrystalToRDL. The conversion quality is not good enough, even the very simple reports could not be converted, the conversion results were missing xml tags,...

The overall rpt to rdl conversion quality is very impressive. Simple and medium complicated reports can almost be fully converted. Complicated line and box objects can be precisely converted. Picture...