I suspect there is a reference somewhere to the wrong drive. This could be just about anywhere. One way to find such references might be to use the Database Documenter, choose forms/reports on the tabs for the documenter dialog to start with. Make sure you set properties and options such that you document code and control properties (so that you get the expressions used in calculated controls). Save the output as a Word file, then use Find feature in word to look for the problem phrase (perhaps that would be G:\). For forms, it might look like this:
If the documents are too large, do them individually for forms/reports/macros/modules. I don't think you'd need to check tables, but if you find nothing and are searching in Word properly, then maybe tables will give you connection properties as well. Or you could post zipped copies of your fe and be here.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.