I am attempting to re-code some text data in the attribute table using the QGIS Field Calculator tool, but I keep getting an annoying error message: "An Error occured while evaluating the calculation string: "No Root Node! Parsing Failed?"

FYI, I am using the expressions bar, this is happening while in editing mode.

No Root Node! Parsing Failed?


It is necessary to enclose the string value you wish to calculate in single quotes like this: 'SAMPLE TEXT'

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.