[kitty]

  this.query().dataSourceTable(tablenum(InventBatch)).clearDynalinks();
    this.query().dataSourceTable(tablenum(InventBatch)).addDynalink(fieldnum(InventBatch, ItemId), InventSum, fieldnum(InventSum, ItemId));
    this.query().dataSourceTable(tablenum(InventBatch)).addDynalink(fieldnum(InventBatch, inventBatchId), InventDim, fieldnum(InventDim, inventBatchId));

не помогло.
В info(inventSum_DS.query().dataSourceNo(1).toString()); вообще нет InventBatch