Error 4802 ??

[Carl Schreiber]

Has anyone recently encountered again this error: Err[4802] ERR_INDICATOR_CANNOT_CREATE: Indicator cannot be created
and would be able to give a hint how to defeat it?

I have built an indicator that runs on all symbols and timeframes since quite a while! But now when I want to load it in OnInit() in my EA the
error 4802 appears, unfortunately without any hint where to start to do something about it :(

I (Win 10, MT5, b.3580) have checked, deleted and again wrote the indicator under a new name in \MQL5\Indicators\ (where two others are saved and loaded by my EA without problem).

My indicator does not have/need resources nor other indicators with the same or different timeframes.

The EA runs in the same timeframe as the indicator.

I have read https://www.mql5.com/en/forum/357491 where he deleted the project file - I have no project just my indicator(s) in \MQL5\Indicators\ and the EA in \MQL5\Experts\

[Lorentzos Roussos]

Carl Schreiber:
Has anyone recently encountered again this error: Err[4802] ERR_INDICATOR_CANNOT_CREATE: Indicator cannot be created
and would be able to give a hint how to defeat it?

I have built an indicator that runs on all symbols and timeframes since quite a while! But now when I want to load it in OnInit() in my EA the
error 4802 appears, unfortunately without any hint where to start to do something about it :(

I (Win 10, MT5, b.3580) have checked, deleted and again wrote the indicator under a new name in \MQL5\Indicators\ (where two others are saved and loaded by my EA without problem).

My indicator does not have/need resources nor other indicators with the same or different timeframes.

The EA runs in the same timeframe as the indicator.

I have read https://www.mql5.com/en/forum/357491 where he deleted the project file - I have no project just my indicator(s) in \MQL5\Indicators\ and the EA in \MQL5\Experts\

I havenot encountered it , but ,the first thing i would try is move the creation on timer , then kill the timer . 

[Carl Schreiber]

Lorentzos Roussos #:

I havenot encountered it , but ,the first thing i would try is move the creation on timer , then kill the timer . 

I don't use a timer, just normal indicators and a normal, simple EA

[Lorentzos Roussos]

Carl Schreiber #:
I don't use a timer, just normal indicators and a normal, simple EA

Yeah but it you can test it , or on tick , have a first load function . Probably not it but you can test it

[Carl Schreiber]

A timer - where? In the EA or in the indicator?

Here it fails:

int OnInit()
  {

//...

   hIndi = iCustom(_Symbol,PERIOD_H1,"Indi");
   if (hIndi == INVALID_HANDLE) {
      Print("Handle Indi failed, err:",err());
      return(INIT_FAILED);
   }

//...

}

[Lorentzos Roussos]

Carl Schreiber #:

A timer - where? In the EA or in the indicator?

Here it fails:

I get 4802 as well .

Try indi.ex5

It works without the extention here too , on init . That means the file is not there or you are reading the wrong folder

int hIndi=INVALID_HANDLE;
int OnInit()
  {
//---
     hIndi = iCustom(_Symbol,PERIOD_H1,"forum\\custom_ema_on_array");
   if (hIndi == INVALID_HANDLE) {
      Print("Handle Indi failed, err:",GetLastError());
      return(INIT_FAILED);
   }else{
   Print("Yay");
   }
//---
   return(INIT_SUCCEEDED);
  }

[Carl Schreiber]

Whooo!?
You're right with "Indi.ex5" it works, and the next indicator I call without ex5 (only the name)?
And now tell me that computers are lifeless machines without their own quirks and spleens.

[Lorentzos Roussos]

Carl Schreiber #:
Whooo!?
You're right with "Indi.ex5" it works, and the next indicator I call without ex5 (only the name)?
And now tell me that computers are lifeless machines without their own quirks and spleens.

Ehehe 🤣 , well what is different on that indicator ? 

[Carl Schreiber]

I have written both, both are located in the directory ..\Indicators\, both are called by iCustom(_Symbol,PERIOD_H1, ...) -  one (3 char name) needs ".ex5" the other (14 char) doesn't.

[Fernando Carreiro]

Carl Schreiber #: I have written both, both are located in the directory ..\Indicators\, both are called by iCustom(_Symbol,PERIOD_H1, ...) -  one (3 char name) needs ".ex5" the other (14 char) doesn't.

Maybe the length of the name is the key factor, requiring a minimum length.

[Enrique Dangeroux]

There also seems to be a maximum length.

Forum on trading, automated trading systems and testing trading strategies

Getting error 4802 when loading custom indicator that loads another custom indicator with iCustom

Martin Bittencourt, 2020.07.26 07:24

Hi,

for the record, I figured out my previous solution was actually incorret. Now I was doing a similar stuff with another indicator (i.e. creating an EA that used a custom indicator which called for another custom indicator) and I got exactly the same problem I had with the case of this thread - but now, there was anything 'problematic' with the file path using spaces or special symbols.

Then, upon better inspection, I noticed the problem was just too big filepath: the name of indicator was being cut. So I shrinked the indicator's name and everything started working.

So, the correct solution is: don't use too big filepaths for your indicators =)