BUG: "Invalid Coordinates" Error Sending @ SAYs to Text File

ID: Q164739

The information in this article applies to:

Microsoft Visual FoxPro for Windows, version 5.0, 5.0a, 6.0

SYMPTOMS

The "Invalid coordinates" error message is received when sending @..SAYs to a text file when the coordinates for the @..SAY reach a certain number. The certain number is dependent on the FontSize property of _SCREEN. The smaller the _SCREEN.FontSize, the larger the coordinate values can be.

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

The "Invalid coordinates" error message is error number 1959. The Help file states that the coordinate values must be between -32768 and 32767. Visual FoxPro 3.x for Windows and Macintosh, and FoxPro for Windows, can use coordinates within the range specified by the Help file without error.

Steps to Reproduce Behavior

1. Enter the following commands in the Visual FoxPro Command window:

      SET DEVICE TO PRINTER
      SET PRINTER TO test.txt
      @ 32700,1 SAY "Hello"     && This line will cause the error
      SET PRINTER TO
      SET DEVICE TO SCREEN

   Although these few lines of code are all that is needed to reproduce
   the error, it may be useful to find out what the maximum coordinate
   can be in a particular situation. Continue with the next few steps to
   determine the maximum coordinate that can be used.

2. Place the following code in a new program file and save it.

      IF FILE("test.txt")
           DELETE FILE "test.txt"
      ENDIF

      _SCREEN.FONTNAME="Arial"
      _SCREEN.FONTSIZE=10

      SET DEVICE TO PRINTER
      SET PRINTER TO test.txt
      FOR i=1 TO 32770
      @ i, 1 SAY "Hello "+ STR(i)
      ENDFOR

      SET PRINTER TO
      SET DEVICE TO SCREEN
      MODIFY FILE test.txt

3. Run the program. Because you should get the "Invalid coordinates"

   error, cancel the program when the error dialog box comes up.

4. Finish out the program by entering the following commands in the

   Visual FoxPro Command window:

      SET PRINTER TO
      SET DEVICE TO SCREEN
      MODIFY FILE test.txt

5. If the text file is not at the bottom, scroll down until the end is

   reached. The maximum coordinate should be listed. With _SCREEN.FontSize
   set to 10, the maximum coordinate should be about 2,047. If the
   _SCREEN.FontSize is set to 4, the maximum coordinate should be about
   5,461. _SCREEN.FontSize won't accept sizes less than 4 point. The
   program code in step 2 above has a command for changing the FontSize
   property of _SCREEN.

Additional query words: kbvfp500 kbvfp600

Keywords          : kbVFp kbVFp500abug kbVFp500bug FxprgGeneral FxprintGeneral kbbuglist
Version           : WINDOWS: 5.0,5.0a,6.0
Platform          : WINDOWS
Issue type        : kbbug

Last Reviewed: November 3, 1998