Thank you. Only now did I read your answer. I was able to understand eventually that I needed to define count there too. I thought you could call it without definining it previously as a sort of global variable. I was simply ignoring the second part of the error, which was explicit enough.
Reading your answer faster would have saved me some trouble 
Unfortunately I’m not getting any notifications per e-mails, I’m not sure why, although I did activate them.