Tempo task report not showing one column that is shown in portal report.

I am creating Tempo Task report, by implementing Portal to SAIL plugin . In the task report my 4th column is lag duration and its datatype is duration() . The problem is that in tempo its showing lag duration column empty whereas in portal i am getting values in column . It seems it is not able to render the datatype "duration()".Apart from this column , in rest all the columns namely : name , start time , completion time respectively i am getting data in tempo . Please suggest my code is given below:
= load(
local!pagingInfo: a!pagingInfo(
startIndex: 1,
batchSize: 5
),
with(
local!datasubset: rule!getTask_NBTY(
pagingInfo: local!pagingInfo
),
a!gridField(
label: local!datasubset.report.name,
instructions: local!datasubset.report.description,
columns: {
a!gridTextColumn(
label: local!datasubset.columns[1].label,
field: local!datasubset.columns[1].field,
...

OriginalPostID-111231

OriginalPostID-111231