Ann: Trading Halt, page-21

From Fin Review

Analysts have also been worried about delays to some of RCR's solar projects. Citigroup said in late July that the commissioning process was taking longer than expected at the Sun Metals solar farm in Queensland's Townsville, estimating that costs could blow out by $7 million.

Now from RCR

In accordance with ASX Listing Rule 17.2, the Company:
a) requests a voluntary suspension as it is in the process of reviewing cost overruns that were recently discovered on a project, which are expected to have a material negative impact on FY18 earnings. Given the materiality of the cost overruns and the need to undertake further work to assess the likely financial impact, the Company is not yet in a position to make an announcement regarding this matter.