Viasoft said it received a letter from Compuware on Tuesday seeking $10 million in damages for an alleged violation of the companies' recently terminated merger agreement.
Compuware agreed to buy Viasoft in July last year for $9 per share, and the boards of both companies had approved the transaction. But the deal was terminated on 18 January because of a failure to settle a US Department of Justice antitrust lawsuit.
Federal regulators claimed that Compuware's $162 million acquisition of the management software maker was anti-competitive because it would reduce competition and "result in higher prices in the market for management geared for mainframe computer software".
Joel Klein, the federal assistant attorney general, said: "The effect of this transaction would be to remove an important competitor, Viasoft, and to strengthen Compuware's dominance over these important mainframe computer software products."
But Compuware now alleges that Viasoft violated its obligation to refrain from seeking alternative takeover proposals and failed to use reasonable efforts to obtain regulatory approval and consummate the proposed transaction.
Steven Whiteman, Viasoft's chairman, president and chief executive, attested that there was absolutely no basis to support Compuware's claims, however.
"Viasoft has fully complied with all of its obligations to Compuware and will vigorously defend against this frivolous and predatory claim," he said.
He added that Viasoft was in the process of evaluating its own claims against Compuware.
"Viasoft hopes that Compuware chooses to abandon this unproductive and futile endeavour," he said.
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