Check if 'Precios' column is empty

[xaabi6]

At the moment I have this code (in 'transform.clj') but it does not seem to work properly:

It checks if the var 'string' has a dash. When it contains a dash it means there is no data, that's why we have to make this check before parsing the string to avoid errors. However, it's still not working although I'm receiving this output:

Followed by this error: