French prosecutors said Wednesday they have opened a preliminary probe into supermarket giant Auchan over complaints it misled consumers over social conditions at its clothes manufacturers in the wake of last year's deadly Bangladesh factory disaster…Auchan says it had never placed any orders at the Rana Plaza garment factory which collapsed…last year…But three lobby groups last month…claim that an investigation found labels from the chain's "In Extenso" range in the rubble…Auchan said…it had not been informed of the probe, and if confirmed, would cooperate with prosecutors in good faith… The company has said it had made "a number of changes" in response to the disaster…