I have the same challenge as GrahamD - How to use the replace string function in Field Calculator?
I have exactly the same challenge.
Exactly the same as GrahamD's challenge, p abbreviated for pan. Type_2 as a test column. duplicated.
Using underdark and eseglem's formulars/advice here is the copy and paste directly from the expression box:
replace("Type_2", "p", "pan")
All text and quotations in red. ok button greyed out.
Output preview: expression invalid Parser Error: (nothing detailed) Eval Error: Column 'p' not found
I get exactly the same results should I swop Type_2 and p around.