Firms have been rushing to get ready for the Y2K bug, littering their offices and their clients’ offices with debugging programs. They are testing and tweaking software in order to avert computer catastrophe on Jan. 1.

But in trying to solve one problem, they may be creating another. In the midst of the rush for compliance, lawyers are now faced with the question of whether they have inadvertently violated agreements covering the software that needs to be fixed and the software that does the fixing.