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While using ISPF on z/OS (TN3270, Model 2, Extended Attributes), I frequently run into situations where the headings and top few lines of the display (and sometimes other data, such as line numbers) will disappear ... like there was some sort of screen display error.  I have to press the PA2 button to restore the display.   Have no idea what causes this ... when trying to make it happen to include a screen shot with this question, I can't reproduce the problem.  (But of course when I'm demonstrating something to a customer ... it occurs often!)  I use another 3270 emulator, and do not have this problem.  Thinking this may be a config issue with Rumba?   9.5, SP1, build 20349.  

Any ideas of what I should check?


#Rumba

While using ISPF on z/OS (TN3270, Model 2, Extended Attributes), I frequently run into situations where the headings and top few lines of the display (and sometimes other data, such as line numbers) will disappear ... like there was some sort of screen display error.  I have to press the PA2 button to restore the display.   Have no idea what causes this ... when trying to make it happen to include a screen shot with this question, I can't reproduce the problem.  (But of course when I'm demonstrating something to a customer ... it occurs often!)  I use another 3270 emulator, and do not have this problem.  Thinking this may be a config issue with Rumba?   9.5, SP1, build 20349.  

Any ideas of what I should check?


#Rumba

I discovered today that this occurs when I have a portion of the screen selected (using the mouse, text is selected with a box highlighted around the text) ... if I scroll the output (the ISPF UP/DOWN command when viewing/editing data), the issue occurs.  

Here is an example:

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