The "comm" variable, in your sample, isn't complete.

You might place the entire command to run into the "comm" variable:

comm = "run /n start " + filename
on selection bar ... &comm

Or:

on selection bar ... run start /n &filename

Your code can be simplified in some places, too.

For instance:

seek('O')
i=1
do while(AsbDoc.ad_menu='O')
	 DEFINE BAR i of oth PROMPT AsbDoc.ad_label
	 comm=alltrim(AsbDoc.ad_command)
	 ON SELECTION BAR i of oth &comm
	 i=i+1
	 skip
enddo	

Can be simplified with a SCAN loop:

seek('O')
i=1
scan while(AsbDoc.ad_menu='O')
	 DEFINE BAR i of oth PROMPT AsbDoc.ad_label
	 comm=alltrim(AsbDoc.ad_command)
	 ON SELECTION BAR i of oth &comm
	 i=i+1
endscan

Or the following:

go top

DO WHILE !EOF()
	recno=recno()
	replace AsbDoc.ad_command with 'do txt with '+ alltrim(str(recno))
	SKIP	
ENDDO

can be changed to a single REPLACE command:

replace all AsbDoc.ad_command with 'do txt with '+ alltrim(str(recno()))

>Hi Hilmar,
>
>My problem is where do I put this command 'run /n start c:\docs\PostList.txt
>' because the submenu is picking up the name from the label field and If I add this command to the prg I am using to bring up the submenu then system crashes.
> ...