In a Tempo Task, I am displaying a grid with 14 columns. One of the column will

In a Tempo Task, I am displaying a grid with 14 columns. One of the column will provide a link to a document for the user, which is optional. If the process instance(a row) has a record in it, then the link should be shown otherwise it shud not. How to achieve this functionality? I am trying the below code, but ending up with the error."Interface Definition: Expression evaluation error at function a!gridField [line 33]: Type Validation: null"

a!gridTextColumn(
label: local!datasubset.columns[11].label,
field: local!datasubset.columns[11].field,
data: if(
local!datasubset.totalCount=0,
{},
local!datasubset.data[11].cells.value
),
links:
if(rule!APN_isBlank(local!datasubset.data[11].cells.value),{},
apply(a!documentDownloadLink(document: _,label: _),
merge(
local!datasubset.data[16].cells.value,
local!datasubse...

OriginalPostID-124214

OriginalPostID-124214