This may help it is from the CR help
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Shared variables use the same memory block to store the value of a variable throughout the main report and all of its subreports. Thus shared variables are even more general than global variables. To use a shared variable, declare it in a formula in the main report as in the following example:
Shared x As Number
x = 1000
and declare it in a formula in the subreport as in the following example:
Shared x as Number
To use shared variables, the variable must be declared and assigned a value before it can be passed between the main report and the subreport.
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As you see you use the shared variables to move data.
Hope this helps.
Regards,
John W.
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