vb.net reporting hide tablix with expression -


i have report have tablix within tablix shown here:

enter image description here

the second tablix need hide when rows less 13. have following expression in group details property hidden :

=iif(runningvalue(fields!blokno.value, countdistinct, "tablix5") >= 13, false, true)

however, not work. header row still shows. doing wrong?

for anyone's benefit. have added visibility expression tablix, apart group details hidden expression. worked. expression used : =iif(countdistinct(fields!blokno.value) >= 13, false, true)


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