My problem is that I implement multiple times the same row.zul. Now I have an ID error because the row.zul file uses static id's.
In zk 8.0 it is possible to use the tag but I can't use that because we are here at a very old version (3.6.4). Do you know any possibilities to solve that problem? I need to give the elements ID's because I want to read from them
You don't need to autogenerate id's.
They need to be in the correct idScope.
An idscope is marked by the interface IdSpace.
So you need to put the row in a separate idScope, so just wrap a component who implement the IdSpace like window, include or create your own component like extends Div implements IdScope.
If you use CSS selectors, remember that you need to alter it a little bit.