The errors view lists all errors within the database (with a few exceptions, e.g. in the print json constructions).
Also here you have the possibilty to click on the wrench in order to access the relevant code to correct the underlying error.
Residual column errors in table views
An error may appear when a field has been deleted while it was still used as a column in a table view.
In this case:
Ninext detects that a column references a field that no longer exists. Ninox does not report any issue, since the field has simply been removed from the schema. This is not a data error, but a residual reference that remains in the internal column configuration of the view.
How to fix
Click on the “formula” link shown in the error. When saved, Ninox automatically refreshes the view configuration and removes references to non-existing fields.
The error immediately disappears from Ninext.