Hi,
Looking at the error message, it indicates that there was a problem reading the raster dataset that is the input to the Snap Pour Point (Spatial Analyst) tool - specifically it failed to find or read the VAT (raster attribute table).
In your Model, that's the output from the Flow Accumulation tool therefore I recommend looking at the properties of that tool. For example, where is the output being written? I always advise using the environment variables %ScratchFolder% or %ScratchGDB% for the ScratchWorkspace e.g. %ScratchFolder%\FlowAccOutput.tif.
For more info see:
- Scratch Folder (Environment setting)—Help | Documentation.
- Scratch GDB (Environment setting)—Help | Documentation.
Then in your Model properties window set the location of the Scratch Workspace environment to a folder you know exists e.g. C:\WatershedDelineation\Scratch in which you have created a file geodatabase `scratch.gdb`.
These variables are substituted at runtime by ArcGIS whether running in the context of ArcMap or ArcGIS Runtime Local Server.
Thanks
Mike