MT5 · Compilation errors
MT5 249 · It's not allowed to declare a reference to a reference | YI GOLD
Official meaning
It's not allowed to declare a reference to a reference
Possible causes · YI GOLD suggestions
Determine the cause from the official meaning, the triggering function and terminal logs.
Troubleshooting · YI GOLD suggestions
Locate the first reported line in MetaEditor. Check syntax, types, function signatures, includes and file permissions, then recompile.