Hi,
I have a very simple workflow and very small dataset that simply reads a CSV with 31 lines (weather data), makes a few small calculations, and then writes to a database table using 'update; insert if new'.
I've included a screenshot of the error below:

I have no joins, no unions, the dataset is small; so memory issues should not be a problem. The database table was created using the very same workflow; the only different now is the writing method was changed from 'create table' to 'update; insert if new' (with the primary key added).
Does anyone have any ideas?