Hello, You must not assume that you have some fixed number of data elements available. *Always* perform a check for BarCount.
So instead of: for (i = 0; i < 10; i++) myArr[i] = 0; always include check: for (i = 0; i < 10 AND i < BarCount; i++) myArr[i] = 0; alternatively: if( BarCount >= 10 ) { ..... put code that assumes that you have 10 data points available here. } Best regards, Tomasz Janeczko amibroker.com ----- Original Message ----- From: "gp_sydney" <[EMAIL PROTECTED]> To: <amibroker@yahoogroups.com> Sent: Saturday, June 16, 2007 2:08 AM Subject: [amibroker] Re: New file uploaded to amibroker > > I still do not understand what the difference between the size of an > > array and the number of elements in an array is. > > They are the same, but when you have a loop writing only 10 elements > to an array, that's not how many elements are in the array, it's only > the number of elements you've changed. The array might have 1000 > elements and all you've done is overwrite the first 10. > > The size of an array is how many elements it's physically possible to > change because there's actually memory allocated for their storage. In > AmiBroker that's always BarCount. > > As I sort-of mentioned before, using arrays where the index is > something other than bars, and you fix the range of the index to > something other than BarCount, can easily lead to problems. If you > have such a formula in a backtest and run that across all symbols, the > moment you hit a symbol where BarCount is less than the maximum index > you use, you'll get an overflow error. > > For example, if you have the following code in a backtest: > > for (i = 0; i < 10; i++) myArr[i] = 0; > > and run it over all symbols, if you hit a new listing that only has > five bars on the chart then you'll get an overflow error when myArr[5] > is referenced for that symbol. > > Regards, > GP > > > > > Please note that this group is for discussion between users only. > > To get support from AmiBroker please send an e-mail directly to > SUPPORT {at} amibroker.com > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > http://www.amibroker.com/devlog/ > > For other support material please check also: > http://www.amibroker.com/support.html > > Yahoo! Groups Links > > > > >