OrderSelect, OrderClose and OrderModify warnings

[Asiwaju Williams Olayemi Mim]

Hi all,

I just downloaded the latest mql4 platform from my broker's website ,

after compiling my expert advisor , i got the warning that the return value should be checked for the following

OrderSelect

OrderClose

OrderModify

but i did not have this challenge from the old platform .

what do i do?

i have attached the code to this message.

somebody please assist.

[Alain Verleyen]

jmorgan:

Hi all,

I just downloaded the latest mql4 platform from my broker's website ,

after compiling my expert advisor , i got the warning that the return value should be checked for the following

OrderSelect

OrderClose

OrderModify

...

https://www.mql5.com/en/forum/151608

[Asiwaju Williams Olayemi Mim]

angevoyageur:
https://www.mql5.com/en/forum/151608

thanks for your prompt reply, but i don't know how to fix it,

i'm just learning coding, and you can see that i was able to code this EA through the help of an automated software.

kindly assist. the whole code is attached to my request, you can modify and send it back .

thanks.

[Ian Venner]

It is good you are learning coding but not good to use automated EA creators because you learn nothing about the code it creates for you.

If yu want to learn about error handling you can read these sections from the mql4 book

error handling function

trade function with error handling 

The book is a little out of date now, the coding examples need small modifications but the basic idea holds true. 

[Syed Naufal Gaddafi]

I still remember when I had to read the book section of mql4. Quite funny feeling when I think of it especially when you realized it can be solved real easy. Just not notice it a bit earlier. XD

[Ian Venner]

Yes the book has the complete solution my first EA was based on the book model.