EX4 file must be compiled using #property strict directive.

 
Unable to publish EA because of this error. Please help.
 
Wahengbam Romita Devi: Unable to publish EA because of this error. Please help.

Then enable the strict property and fix your code that so that it will compile properly.

 
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  2. Always use strict. Fixing the warnings will save you hours of debugging, but you must understand the differences.

 

References:

Updated MQL4 - Language Basics - MQL4 Reference

"... the new #property strict property has been introduced to provide maximum compatibility ... "

Reason: