Disappearing DDS Window Screens

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If you like to use the data description specifications (DDS) window keywords, you may have already experienced the frustration of having screens inexplicably blank out when you try to present your DDS window.

If you call an external RPG program that displays a window over a previously displayed screen format, the screen displayed by the preceding program blank out before the window is displayed. This seems to defeat the purpose of using a window.

One solution to this problem is to add the dummy format like the one shown in 3 to the display file that contains the window. The dummy format does not need to be utilized anywhere, but it does seem to correct the problem.

One solution to this problem is to add the dummy format like the one shown in Figure 3 to the display file that contains the window. The dummy format does not need to be utilized anywhere, but it does seem to correct the problem.

As you make this correction, two questions will come to mind. First, why doesn't the compiler do this for me? Second, if this dummy format is necessary to make DDS windows function correctly, why didn't SDA put it in there for me?

Only the wizards at the IBM development lab know for sure, but it can sure make the rest of us wonder....


Disappearing DDS Window Screens

Figure 3 Dummy Format for DDS Window

 *. 1 ...+... 2 ...+... 3 ...+... 4 ...+... 5 ...+... 6 ...+... 7 A R DUMMY ASSUME A 1 2' ' 
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