Topic:
Areal amplitude extraction fails occasionally on some 2D lines.

Description:
SYMPTOM:    Under certain conditions, the areal amplitude extraction
            fails on some 2D lines and the following error is returned: 
 
              Could not get node information for temporary path subsegment 96
              Database field id mismatch DB token(0,0,0) is incompatible with 
              FID 101007027
 
             This happens when lines selected have station locations but no 
             seismic data or when the lines have strange end trace
             number(1677217).  

Solution:
WORKAROUND: Avoid selecting lines that have no seismic traces loaded. For lines
            with strange end trace use the new option in iesx_util in 10.1 to
            correct the trace range before running the areal extract.  
          
RESOLUTION: In 10.1, which was released in December, 1996, use the new option 
            in "iesx_util" to correct the trace numbers before running Areal
            amplitude extraction. This problem was corrected for GeoFrame 3.0, 
            where the areal extraction ignores lines with no seismic traces and  
            continues with the remaining lines. 



Last Modified on: 04-JAN-99