Subject Re: Error Code 239 IDAPI error From Michael <michael@abstractservices.com.au> Date Sun, 22 Oct 2023 17:46:58 -0400 Newsgroups dbase.getting-started Thanks Ed, Top tip. However, I do close the timer object. if you look at the task manager, I rarely use more than 30mb ram when running for hours. Thanks for the tip. Edward Racht Wrote: > On 10/20/2023 8:37 AM, MichaelItaliano wrote: > > I do run timers in the second app that checks if new records a re > > written and then writes them to a server somewhere. > > There are some threads in programming concerning something similar to > your issue - you may be interested in. > > ed > -------------------------- > Re: timer class > From        Andy Taylor <andy.taylor.1959@outlook.com> > Date        Sat, 05 Dec 2020 04:50:37 -0500 > Newsgroups        dbase.programming > > Hi Gaetano, > > >  > > MethodTwo >  > Yes, I have implemented that. It seems to work but I need to launch >  > another run in the morning to check if that affects another session > of dBase. > > As I understand it each instance of dBASE should be fully encapsulated > and effectively ignored by the others. > >  >> Finally, if you make the timer an object of the form AND you refer > back to the form as the timer's parent make sure you remove the >  >> parent reference from the timer before you close the form; otherwise > dBASE wont release the form from memory properly.  You don't >  >> need to do this but I usually do as it allows me to traverse all > form objects easily using the inspector. >  >> >  > good tip, thanks! I have disabled the timer, but how do I remove the > parent link? >  > this.timer.parent = null in the onClose event handler? > > Yes, that removes the reference from the timer object but I would also > do this.timer = null form the form because I'm anal about it. > >  > by the way, you mentioned canClose, why not onClose? > Just because onClose happens after the close event and normally I don't > want an active timer if the form has closed in case > the timer fires when I don't want it to - say when the form is still > closing.  In this case however, the onTimer event actually > closes the form so the point is probably moot. > > I would change your code slightly to read as follows: > > function form_canClose() >     this.timer.enabled = false >     this.timer.parent = null >     this.timer = null  // at this point the timer should release from > memory automatically as nothing is holding it in place >     return > > function form_onOpen() >     this.timer = new Timer( ) // Make timer a property of the form >     this.timer.parent = this // Assign form as timer's parent >     this.timer.onTimer = {;this.parent.close()} >     this.timer.interval = 13 // Fire timer every 13 seconds >     this.timer.enabled = true // Activate timer >     return >