I want to fetch multiple values and put it in the grid of my tempo report

I can try helping you debug....
1. I am not sure what Appian version you are using. Make sure type!GridTextColumn() is compatible and supported by your version since now we use a!gridTextColumn().

2. Your expression has an extra parenthesis. Make sure this is fixed.
3. With these changes, try using index(local!temp.data,"position",{}) in the data value for the column with label "Interest Position"

If the error still persists, modify local!temp : todatasubset(local!datasubset.data.position) to local!temp: local!datasubset.data.position and modify the respective gridTextColumn appropriately. I guess this maybe causing the error since what you are trying to convert to a datasubset is already in the same form. Let me know if this works.

I can try helping you debug....
1. I am not sure what Appian version you are using. Make sure type!GridTextColumn() is compatible and supported by your version since now we use a!gridTextColumn().

2. Your expression has an extra parenthesis. Make sure this is fixed.
3. With these changes, try using index(local!temp.data,"position",{}) in the data value for the column with label "Interest Position"

If the error still persists, modify local!temp : todatasubset(local!datasubset.data.position) to local!temp: local!datasubset.data.position and modify the respective gridTextColumn appropriately. I guess this maybe causing the error since what you are trying to convert to a datasubset is already in the same form. Let me know if this works.