These instructions assume the following:
You want to remove some or all variants associated with an Alternative.
Before making any further changes to the watershed Zip up a backup copy!!
For each alternative for which you want to remove variants, do the following
Identify which (if any) variants you would like to keep for your alternative
Open the Alternative Editor.
Select the offending alternative and select the Time-Series tab to see the assortment of variants. Also note the associated Network for that alternative.

Close ResSim
Navigate to the watershed location in your (File Explorer or equivalent).
Go to the rss directory and sort by file type.
Delete the *.fits files associates with each offending variant.
Do NOT delete these files, which are associated with the ResSim default.
- <altname>.fits
- <altname>Obs.fits
Next, if you have Global Variables, you will need to get rid of the files related to Global Variables variant information. Delete the variant *.igv files.
Do NOT delete the igv files associated with the default ResSim alternative.
Edit the ralt file associated with the Alternative's Network
Search for "InputTSVariant"
Delete the lines associated with your unwanted variants. Save file.
good to go.