(Reuters) – Australian bourse operator ASX Ltd said on Thursday it would take a pretax charge of between A$245 million and A$255 million ($165 million-$172 million) in the first half as it derecognises the software aimed to develop to replace its ageing clearing and settlement system.

($1 = 1.4841 Australian dollars)

(Reporting by Sameer Manekar in Bengaluru; Editing by Maju Samuel)