KS> On switching WordPerfect to the background, "background 
 KS> execution" is halted. [...] And yes, DOS_BACKGROUND_EXECUTION is 
 KS> set to on, as it was in Warp 3.
Because of the hardware limitations of some display adapters (which weren't 
designed with multitasking and multiple screen sessions in mind), DOS 
programs must not be run in the background in certain graphics modes (if they 
were allowed to, they would either corrupt the foreground session, or become 
confused as to the state of the display adapter and crash).  
Irrespective of the state of DOS_BACKGROUND_EXECUTION, OS/2 Warp will suspend 
a VDM that has put the display into these graphics modes if it is switched to 
the background.
WordPerfect for DOS has a WYSIWYG option that uses graphics mode instead of 
text mode.  Are you using that by any chance ?
 ¯ JdeBP ®
--- FleetStreet 1.16 NR
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