how can i connect two local variables into one node in knime?
You mean “Flow Variables”? In case you cannot cascade them, you can go for this node instead:
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tnx, but how i can add to this additional string?
still,
i dont understood how can i combine the 2 values of flow variables in the name of the excel file?
Mind giving a concrete example of your issue?
Hi there @student_d,
if you are wondering how can you merge two or more flow variables into one then you should use String Manipulation (Variable) node. In it there is function join() that accepts string flow variables and merges them.
If you were looking for something else then an example as @qqilihq said would be helpful 
Br,
Ivan