Correct. Unless the contract includes a maintenance SLA there's no reason for the original creators to "fix" anything unless a new contract is made up for that, including payment for the effort.
If the software was signed off on by the customer, he agreed that it works according to the specs agreed upon in the original contract.
If it doesn't that's the customer's responsibility for not performing his acceptance tests properly.
hollystyles commented: Enjoyed that! +7
jwenting 1,905 duckman Team Colleague
jwenting 1,905 duckman Team Colleague
jwenting 1,905 duckman Team Colleague
majestic0110 commented: great sense of humour! +1