reporting services - #Error in SSRS expression -

in report, have include courses info(in report) in parameter(selected value)

i using expression in checkbox:

="course: " & parameters!course.label  

but throws #error when run report. idea going wrong.

thanks, ar

try this:

="course: " & join(parameters!year.label, ",") 

if parameter multivalue necessary join labels returns, if select multiple values join() function return comma separated values.