Getting Constantly an Error #2: Common Error - Despite Everything Works Fine?

New comment
 

Hi,

has anybody recognized this 'feature' as well - may as well in mt5 too?

Developing a multi-symbol-system I do:

      ResetLastError();
      int cop1=CopyRates(Sym, PERIOD_M1, 0,3, τRates);
      errCheck = StringFormat("%s cpy:%i ArrSz:%i err:%s",Sym,cop1,ArraySize(τRates),_LastError);

I now I get this if I use CopyRates on any requested symbol:

EURUSD cpy:3 ArrSz:3 err:2 // err#2 = Common Error
 
  1. Do not look at _LastError unless you have an error. Cop1 was not -1.
  2. If it fails you have to test for 4066/4073 and retry
  3. Why not use ArrayCopyRates? Once the first call completes successfully, no further calls are necessary and you have access to the entire M1 without copying.
 
whroeder1:
Do not look at _LastError unless you have an error. Cop1 was not -1.
Do you mean this for security reasons for Metaquotes and/or the broker as this way they can always say our quotes are correct your code or your connections has some problems (err #2) therefore you are responsible!
 
Neither, its probably how the function is coded. It called  function to lookup the the sym/M1 chart, and it had been removed (after 10 minutes of unuse.) So it loaded it from disk, and did its thing. The 2 was left over from internal processing. Meaning less because the function succeeded.
New comment
Reason: