Depending on the exact version of Forms you are using, FRM-92102 generally means that the client machine was unable to contact the server or the listener on the server. This can occur if there is a network interruption, or if OHS stops responding, or if OC4J_BI_FORMS stops responding.
Unless you have altered the default settings in the installation, a Forms applicaton can never timeout. It is designed with a "heartbeat" which continually tells the server that the client applet is still running and healthly. In your case (FRM-92102), it isn't the form that is unhealthy, it is the server who likely has the issue (or the network connecting the client to server. Carefully review your OHS and OC4J logs for possible failure and restarts. Such automatic restarts can cause this problem.