In a small bowl combine pitted cherries, 1/3 cup sugar, 2 tbsp flour, 1/4 tsp salt, and 2 tbsp Tapioca. Stir together until the cherries are coated evenly.
Place one cup of cherry mixture in 6 individual sized baking dishes{pint sized mason jars will work, use the wide mouth jars} (or you can bake one big batch in an 8in x 8in dish). Set aside.
In a separate bowl combine the ingredients for the crumb topping. Combine oats, brown sugar, 1/4 cup flour, chopped pecans and melted butter. Stir until the mixture becomes wet and crumbly. Evenly distribute the mixture between the 6 dishes (or spread evenly across the 8x8in baking dish).
Place individual sized baking dishes on a baking sheet to help prevent any spills in your oven and for easy transport in and out of the oven.
Bake for 40-45 minutes. Let cool slightly before serving.