I have a main report - "MainReport.trdp" and a report that I use in the detail section of the main report as a subreport twice - "SubReport.trdp".

In "SubReport.trdp", I have a report parameter whose value I use in one of the calculated fields in its data source component.

The calculated field's expression is evaluated based on the report parameter value passed with the SubReport's ReportSource object of the first SubReport item for both subreports.

For example, if I pass the string "A" to the first subreport's parameter and the string "B" to the second, the calculated field in both instances will evaluate based on the first value, in this case -  "A".

The second subreport should evaluate the calculated field based on the value passed to its report parameter, it should not matter if I have the same report rendered as a subreport multiple times and whether a different parameter value is passed to them.