Re: Creating Textbox according to if statement (condition)
I don't really get what you are trying to achieve, but as mentioned above and in one of your previous threads, you can't compare a field to a single value unless there is only one possible value for that field
SpalteA = 'f'
What are you expect QV to return here? SpalteA is an field (or a vector / array) that contains 5 values, so QV don't know how to evaluate this comparison unless you select a value in SpalteA.
You can add some aggregation functions to get around this, like suggested above or maybe like