Sergey, I'm not sure I understand, but I think your are saying that you have 3 grids on a form and that the underlaying tables of the grids are involved in some type of relationship and your indices are vanishing after adding a new record in the 3rd grid? Is that correct? Maybe someone who reads/speaks Russian fluently will read your thread and assist.
Ñåðãåé, ÿ íå óâåðåí, ÷òî ÿ ïîíèìàþ, íî ÿ äóìàþ âàø, ãîâîðÿò, ÷òî Âû èìååòå 3 ñåòêè íà ôîðìå è ÷òî óíäåðëåéèíã ñòîëû ñåòîê âêëþ÷àþò â íåêîòîðûé òèï îòíîøåíèé, è âàøè èíäåêñû èñ÷åçàþò ïîñëå äîáàâëåíèÿ íîâîãî îò÷åòà(ðåêîðäà) â 3-üåé ñåòêå? Ýòî ïðàâèëüíî? Âîçìîæíî êòî - òî, êòî ÷èòàåò/ãîâîðèò ïî-ðóññêè ïëàâíî, áóäåò ÷èòàòü âàøó íèòü è ïîìîæåò.
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"When the debate is lost, slander becomes the tool of the loser." - Socrates
Vita contingit, Vive cum eo. (Life Happens, Live With it.)
"Life is not measured by the number of breaths we take, but by the moments that take our breath away." -- author unknown
"De omnibus dubitandum"