• Microsoft is phasing out support for the Windows help facility (WinHLP) that QuikGrid uses. Under Windows VISTA and Windows 7 you will receive a message similar to the following when you attempt to access "Help":
  
  "The Help for this program was created in Windows Help format, which depends on a feature that isn’t included in this version of Windows. However, you can download a program that will allow you to view Help created in the Windows Help format."
  
  This is not a bug. To give Microsoft due credit, the WinHLP program dates back to 1992, when I first started writing QuikGrid. Further information is available from Microsoft here.
  
  The help file is now available as an online html document here. You may obtain a copy for installation on your computer by downloading a .zip file here that contains the html document.
  

• Upon initial startup the "view... menu..." would display the default preferences, not any customized preferences that may have been set up. The correct customized preferences were however selected and this bug did not otherwise affect the behaviour of the program.

• The description for the command "file load quikgrid {filename}" is incorrect. It should read "file load quikgrid grid {filename} ...". (The word "grid" must be included after "quikgrid").
  

In Version 5.2 and previous versions back to 1999 (Corrected in Version 5.3)

• A bug exists in the grid generation module that manifests itself typically as differences in the placement of unevaluated grid intersections around the edges of the generated grid or in areas where there are no data points.  (That is an oversimplified description of the results of a programming bug - an array index overflow in areas near the edge of the grid or the edge of areas where there are no data points and grid intersections are left undefined). My thanks go to Matt Gessner, a software engineer from Ohio for identifying and correcting this bug.
  

In Version 5.1 (Corrected in Version 5.2)

• A problem exists in the colour legend which causes zero to be displayed as a very small number (e.g. 0.1E-09) under some conditions.
  

1. It is possible to re-read an input file by using "#" as the file name. For example:
   
   Edit input position 1 2 4         // Read z coordinate from 4th position on the line.
   Input File Metric "*"              // Prompt for the input file name.
   Function Copy Grid to color.
   Edit input position 1 2 3         // Read z coordinate from 3rd position on the line.
   Input File Metric "#"               // Reread data from the same input file.
   
   The above example would show the z data from position 4 as colour variations and the data from position 3 as contour lines.
   
   
2. If you want to use a comment with one of the input file commands the file name must be enclosed in quotes. For example:
   
   Input File Metric "mydata.txt"   //  This is a comment.
   
   
3. The description for the command "file load quikgrid {filename}" should read:
   
   file load quikgrid grid {filename}
   

Dec 13/10