Unfortunately, I cannot reproduce your issue. When I run the calculation you have uploaded together with the new INCAR that you have posted, it gives me non-zero entries in the WAVECARF file. What VASP version are you using to run these calculations?
As a side note, when you use ALGO=exact, there is no need to do run so many electronic minimization steps, so you don't have to specify NELMIN. It could only potentially be relevant for ALGO=normal or similar.
