Oracle CEO Larry Ellison has once against lashed out against Hewlett-Packard's new CEO Leo Apotheker.
The attack comes ahead of the Oracle-SAP industrial espionage trial, which begins on Monday.
Oracle had earlier criticised HP for hiring Apotheker to replace Mark Hurd, who joined Oracle as president.
The enterprise software maker claims that Apothekar, while working at SAP as its CEO, knew that SAP subsidiary TomorrowNow was stealing software from Oracle but didn't do anything about it initially.
However, HP chairman Roy Lane had said that Oracle had no proof of Apotheke's involvement in the industrial espionage.
"I don't think Ray Lane wants to risk Leo Apotheker testifying under oath as to why he allowed the theft of Oracle property to continue for 8 months after he was made sole CEO of SAP," he added.