Someone discovered an error/failure/typo. How can I upload a new patch set?

Fetch from Gerrit

Right click Saros and select Team → Remote → Fetch from Gerrit...

Fetch list of changes

Gerrit hint

You can determine the change number of a change from the individual change page in the download command. You can also just take the URI from there.

Click on the Change field and use CTRL+Space to fetch a list of available changes. The format is the change number, followed by the patch set.
You can also enter the URI directly use e.g. refs/changes/47/47/3, the format is to give the last two digits of the change, followed by the complete change number and then select the patch set you want.

Select a change from the dropdown list

Select the change you want to modify. After selecting a change the number will be replaced with the URI of the change. In the string "mmm - n" the mmm stands for the change number and n for the n-th patch set of this change.

Pick a local branch name

Select a name for the local branch. EGit will create and checkout the change in a new branch. Click Finish

Start your modification

Now you are on the branch that contains your previous change. You are now able to do the desired modification.

Open commit dialog

Once you are done with your modification, right click on your project Saros and select Team → Commit...

Amending your commit

Press the amend button (left circle in the top right corner). The Gerrit button (right circle in the top right corner) will activate automatically.
This will combine your new and old change. The commit dialog will automatically pick the commit message from the previous commit and at its change ID. Gerrit needs the change ID to identify the this commit as a new patch set and not as a new change. You can also edit your commit message, if you like. Click Commit
This will create a local commit of your change.

Open push dialog

Right click Saros and select Team → Remote → Push...

Pushing your commits

Select Configured remote repository and click Next

Enter push specifications

Fill in

• Source ref HEAD
• Destination ref refs/for/master

and click Add Spec

Press Next

Press Next