Hi @Eshetu -
Which version of InVEST are you using? When you have a problem, please always upload the log file (.txt file with a long name) that is created in your Workspace, which provides us with useful information like the InVEST version.
This reminds me of this post where someone had a lot of missing data in their results. NDR uses some of the same processes as SWY, so could have similar problems.
Please check out that post, see if it helps, and post your logfile if it doesn’t solve your problem - thanks!
~ Stacie