Question
Hello, I am trying to define a concatenation layer in Matlab 2020a but I get the following error: Error using concatenationLayer Cannot define property 'Name' in class 'concatenationLayer' because the property has already been defined in the superclass 'Layer'. I get the same error even using the simple command from the help from matlab concat = concatenationLayer(4,2,'Name','concat') This is strange, because I have been using this command since version 2019a but now that I migrated to 2020a I get the error. I hope anyone can help me to fix this issue.
Expert Answer
John Michell
PhD Expert
Answered Aug 24, 2026
Hi,
Did you try using a new layer name other than 'concat', as the error mentions the name has already been used in a superclass.
I tried to work the same at my end, it works completely fine for me.
If the problem still persists, try using the following commands and retry your work.
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