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Accumulate values in a raster in Modelbuilder

Question asked by kathyf33 on May 10, 2019
Latest reply on Aug 2, 2019 by Hornbydd

I’m using Modelbuilder with a defined For loop (1 to 1000, for example) and a submodel.  In each  iteration of the submodel, I create a distance raster that I want to add to an Accumulation raster (which I want to be initially 0).  After the 1000th iteration, I want to put the Accumulation raster into a geodatabase.  To be clear, I don’t want to create 1000 rasters and add them together. I’d like to do everything in memory until I get the final accumulated raster that I save. It’s basically

Accumulate = Accumulate + SelectDist

Is this possible?  I have tried the Raster Calculator and the Plus tool and I can’t seem to accumulate anything.  I get the value of the last iteration.