NEW DELHI: Admitting that ED erred in summoning senior advocates Arvind Datar and Pratap Venugopal for rendering legal opinions to clients in a laundering case, attorney general R Venkataramani Monday told Supreme Court that all probe agencies have been asked not to commit this mistake in future. “We’ll frame guidelines in this regard,” AG told a bench of CJI B R Gavai and Justice K Vinod Chandran while it was hearing a suo motu case regarding the summons, which were later withdrawn.“ED officers are crossing all limits. They must know that under law, communication between a lawyer and his client is a privileged communication,” Gavai said.