Actually I changed form yesterday. "View Report" button was set to run rule, that is now under QdabraRules -> finishedLoading: "Query Countries if ActualCostsStatus is Paid". This rule runs 2 queries and especially "Countries for Business Trip" query is causing this issue. If I don't run this query, "CostCountryArm_BT", "CostCityArm_BT", "ActualPerDiemCountryArm_BT" and "ActualPerDiemCityArm_BT" fields will not be updated. These queries run only, if entire form is filled already and users just need to view report on another view. Forms, where "ActualCostsRepeating" table contains up to 4 rows, open normally. If it contains 6 rows, I receive error.