Please consult system admin error on delete item Event.
In Pega v7.4,
We have repeat grid layout. And we have a remove(its a link) option for each line item.
Lets take grid contains Emp1, Emp2, Emp3 details. I deleted Emp2 and emp3 using the delete link provided with no issues. And then following if i delete Emp1 getting an error mentioned "Please contact system admin"(attached the screen shot). This happens only if tries to delete line item in the grid counts to One.
On remove link in repeat grid, If we write the actions in the order "Delete item", a Data transform and then refresh this section , i am not facing any exception but if i call DT inside the action Refresh this section then intermittently facing the issue.
From the tracer exception it looks like when this Data Transform is running the the step page might not be present in the clipboard. Could you please check in the clipboard when this issue occurs if the step page is already present in the clipboard or not. Also if you again try to delete after facing this issue, does it delete without any issue (i think it should be deleting).
Also could you please check the below discussion which might help to debug the issue: