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Full Equations (FEQ) Model for the Solution of the Full, Dynamic Equations of Motion for One-Dimensional Unsteady Flow in Open Channels and Through Control Structures

U.S. GEOLOGICAL SURVEY WATER-RESOURCES INVESTIGATIONS REPORT 96-4240

APPENDIX 4: FULL EQUATIONS MODEL ERROR MESSAGES, WARNINGS, AND BUGS:VERSION 8.0


Messages issued in FEQ to the user are in three categories. The first category of messages describe some condition in the input for which the intent of the user is not understood. Some simple errors can be identified; standard corrective action can then be taken, and reading and checking the input to search for additional errors can continue in simulation. The run, however, will terminate when the input has been checked. Some errors may be detected only during execution of the unsteady-flow computations. These errors are not corrected and, in most cases, the computations are terminated.

The second category consists of warning messages reporting conditions that may indicate a user error or that highlight the possibility of some later computational problem. Some assumption to circumvent the problem is made, and computations continue. The user should always check the warning messages to make sure that the default action taken in FEQ simulation has not affected the results.

The third category of messages consists of bug messages reporting conditions that should not occur. Such messages, which are usually indicative of some problem in the computer code, should be infrequent. However, an application may result in conditions not tested, and a bug may be revealed. Bug messages are not documented here.

All messages given by FEQ are of the form *ERR:nn*, *WRN:mm*, or *BUG-kk* where nn, mm, and kk are the respective message numbers. Error messages in any other form originate from the computer operating system, not FEQ.

*ERR:NN* MESSAGES
*WRN:NN* MESSAGES
BUG:nn MESSAGES

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