Yea. It took me awhile to figure this out. ON.ABORT sets up a (VOC) entry to be run on a program abort; but only once! If you want it to happen again, which I wanted in our menu system (i.e. I didn't want people to press [Ctrl]+C to get to TCL out of our menu system), then my (VOC) item "SORRY" looks like:

001  PA
003  MENU

...where "ON.ABORT SORRY" is activated to occur upon the next program abort (which a break key is an abort) and "MENU" sends the user back to the main menu. When a user logs on I execute this command (and a UTD.OPTION 105 OFF to make sure ON.ABORT can't be executed from within BASIC) then route users to the main menu. Now, if anyone tries to break out of our menu system the abort management is activated again (awaiting an abort) and the user is routed to the main menu. This is convoluted, but it works. :-)


----- Original Message -----
*Date:* 12/23/2013 1:13 PM
*Subject:* Re: [U2] [UV] INPUTTRAP Statement
Could you explain more why your On.Abort executes another On.Abort ?
I didn't understand that part.

-----Original Message-----
From: Bill Haskett <>
To: U2 Users List <>
Sent: Mon, Dec 23, 2013 1:06 pm
Subject: Re: [U2] [UV] INPUTTRAP Statement

You can't trap the 'break' key, but you can prevent its usage.  In
UniData it is:


...which is a very finicky task to accomplish in that the command
doesn't permanently turn on or off anything, it simply executes a
command on a program abort.  For us, the command executes the ON.ABORT
command again (for the next abort) the routes the user back to the main
menu; a very abstract way to get the job done.



----- Original Message -----
*Date:* 12/23/2013 11:56 AM
*Subject:* Re: [U2] [UV] INPUTTRAP Statement
I don't think you can use *any* of the chars that are pre-trapped like ctrl-c
That is, chars that actually make the op-sys wake up and act in immediate mode

If you are trying to *trap* the break so you can see when someone is trying to
use it, there is another way, although the other way of which I'm thinking
doesn't *prevent* its use, it just *records* its use.
Maybe you could go into more detail about why you're trying to trap ctrl-c

-----Original Message-----
From: Perry Taylor <>
To: U2-Users List <>
Sent: Mon, Dec 23, 2013 11:41 am
Subject: [U2] [UV] INPUTTRAP Statement

Has anyone ever used the INPUTTRAP statement in UniVerse BASIC?  I want to be
able to trap a break (Ctrl-c) but I can't seem to get it to work with CHAR(3),
or any other character for that matter.  The UniVerse BASIC Commands
documentation provides no examples on its use.

Anybody done anything like this?  Any sample code you're willing to share?

Perry Taylor
Senior MV Architect
888 West Market Street, Suite 400
Louisville, KY 40202<>

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