Writeback: sometimes when adding a new columns, a all columns crash
This happened many times. Sometimes I add a new field to a writeback table, the field says "Error!" and all the fields before say the same. I remove the fields one by one but this does not mater. Even if you delete all the columns the problem persists. The object is lost forever. I lost a lot of work because of this. It happens at random. I believe one way to reproduce it is to try to add one field after another quickly.