This message will appear if the end of the file is prematurely encountered in 

 the SEAWL file and is remedied by adding more values to the file, changing the 

 value of the total number of calculation cells on Line A. 3, or changing the 

 grid cell numbers where the calculation starts and/or ends on Line A. 4. 



19. ERROR FOUND IN SWLIN. LAST SEAWALL BLOCK(S) OUTSIDE THE CALCU- 

 LATION GRID. Following specification of the total number of calculation cells 

 on Line A. 3 and of the grid cell numbers where the simulation starts and ends 

 on Line A. 4, seawall positions will be read from the data file SEAWL by sub- 

 routine SWLIN. This message will appear if the end of the file is prematurely 

 encountered in the SEAWL file and is remedied by adding more values to the 

 file, changing the value of the total number of calculation cells on Line A. 3, 

 or changing the grid cell numbers where the calculation starts and/or ends on 

 Line A . 4 . 



20. ERROR FOUND IN WAVIN. FILE WAVES CONTAINS TOO FEW NEARSHORE WAVE 

 DATA POINTS. Following specification of the total number of calculation cells 

 on Line A. 3 and of the grid cell numbers where simulation starts and ends on 

 Line A. 4, offshore and nearshore wave data will be read from the data file 

 WAVES by subroutine WAVIN. This message will appear if the end of the WAVES 

 file is prematurely encountered while reading the nearshore wave data and is 

 remedied by adding more values to the file, changing the value of the total 

 number of calculation cells on Line A. 3, or changing the grid cell numbers 

 where the calculation starts and/or ends on Line A. 4. 



21. ERROR. GROIN CONNECTED TO A DETACHED BREAKWATER MUST BE CLASSIFIED 

 AS A DIFFRACTING GROIN. Two of the basic structural elements in GENESIS, the 

 groin and the detached breakwater, may be combined to produce more complex 

 configurations, e.g., spur jetties. However, one requirement is that the 

 groin be specified as diffracting. This error will appear if a detached 

 breakwater is attached to a nondiffracting groin and is remedied by removing 

 values specifying a nondiffracting groin on Lines D.4 and D.5 in the START 

 file and placing them on Lines E.4-E.6 corresponding to a diffracting groin. 



22. ERROR. GROIN NEXT TO GRID BOUNDARY. The longshore sand transport 

 rate depends on the angle between the wave crests and the shoreline. To 

 calculate the shoreline orientation, the shoreline location in two adjacent 

 calculation cells is needed. At the location of groins, a straight line 



C7 



