As I understand it the project is dependent on high nickel prices. Its continuation depends not on what the price is today (far too low), but the projection of the future price relative to costs of continuing (may be necessary to write off a lot of money already expended though). So continuing with the project will depend on someone's guess as to the future price of nickel plus how big a proportion of the expenditure has already been incurred. Unlike Rio, the company is not in financial difficulties, so an actual shortage of funds to continue is unlikely - just has to decide that a short term loss is acceptable in the expectation of long term return to profitability.
There has also been speculation about technical problems, but I would discount these.
John

