Create 3 different Images with 1 Flow using flow-variables

Dear community!

I am beginner in KNIME. I am trying ti create a flow.

The aim is to print 3 images [Node: Image Writer (Port)] with 1 flow. There are 3 groups in the data. For each group 1 image should be printed.

The Data looks like this:

Group 1; Month 1;Amount

Group 1; Month 1;Amount

Group 2; Month 1;Amount

Group 2; Month 2;Amount

Group 3; Month 1;Amount

Group 3; Month 2;Amount

For each group i would like to print 1 bar-chart (png). The name of the written Image should contain the name of the group.

Any suggestions how this could work? I tried it with Row Filter/Group Loop Start/Table Row to Variable/String to Path/Image Writer… But I found no solution.

Is this even possible or do i have to create a string configuration-node and run the flow for each group manually?

I would be grateful for help.

Greetings

Jakob