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Title: Re: [amibroker] Re: How to "Error Trap" in Automatic Analysis?
You can conrol popups the same way as you do with Say(), and only pop them when the message differs from the previous one.
herman
Monday, August 18, 2008, 7:46:27 AM, you wrote:
> Take a look at the PopupWindow function.
> Be aware though that the AFL code won't stop while the window is
> displayed, so if you do an exploration over a few hundred stocks where
> every stock gives a popup window, you could end up with dozens of the
> windows showing at the same time.
> GP
> --- In amibroker@xxxxxxxxxxxxxxx, "Ken Close" <ken45140@xxx> wrote:
>> I do not recall this being discussed (but of course I forget lots of
> past
>> messages).
>>
>> In making some code to be run in AA by an inexperienced AB user, I
> want to
>> error trap some situations that are likely to be encountered and
> then give a
>> message to the user instead of the program dropping into the Formula
> Editor
>> with a yellow line on the offending line.
>>
>> In general, is it possible?
>>
>> I realize the answer is to set up the program to avoid every
> situation where
>> the error might occur.
>>
>> In my case, I have a subscripted formula in a loop which will yield a
>> "subscript out of range" if the current symbol contains less days of
> data
>> than the Parameters are set for.
>>
>> I set a startdate, calculate a "FirstBar" for the range that is set, and
>> then use a "FirstBar - 1" subscript, which works fine if the calculated
>> FirstBar is always greater than the actual first bar. If the data
> does not
>> exist earlier than the date set for FirstBar, then the error pops up.
>>
>> Thus my question: is it possible to sense the error condition and
> display
>> an error message of the users choosing?
>>
>> The less elegant way is to instruct the user that if they see a
> yellow line
>> in the Formula Editor, to check that the FirstBar date is set at or
> after
>> the beginning of the shortest data symbol.
>>
>> Comments?
>>
>> Ken
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