I'm getting the following import error message when trying to import contacts:
Invalid value for field(s): Geo code 1
Can anyone please explain?
It seems to mean you are trying to import the latitude (or longitude, never remember) of your contact. Do you really have a column that contains that?
Sometimes, the suggestion to map your columns in the csv file and the fields in civi aren't correct, check that you aren't trying to import a completely unrelated "code" column into that "geo code +" field.
Your easiest bet to see what's the expected format of each of the fields is to export a few contacts from civi and include these fields, so you can see how you need to format them on your own file.