The way I undersand the NR...all kinds of different equipment had to be brought on site, including the mud mats, to do the test. Since the equipment failed, it made no sense to keep all the other equipment there until the equipment was replaced or repaired, hence, they released the other crews.
They will likely try again when the equipment becomes available or use some other testing method. But until then, they need to keep costs down and release the crews.
Hopefully we will hear something soon.
mNm