After an updated of AUCTeX (to 11.87) the solution that worked wonderful from this answer stopped working. In particular, I got the following error: reftex-reference: Wrong number of arguments: ...
When you create a new section within AUCTeX (using C-c C-s) and give the section a name, RefTeX will prompt you for a title, insert the section, and then prompt you for a label. This label is ...
Today I switched to the import package with the hope that it will simplify the management of the files of my text. It surely did that, but.... It broke RefTex in emacs. Now, I cannot lookup my labels ...