MQL5 — Guaranteed Timeout and Cancellation of Blocking File Operations

[Maher Al-mashharawi]

Hello MetaQuotes Support,

We need to determine whether an MQL5 Expert Advisor can enforce a strict 14,400-second wall-clock deadline when an in-progress file operation does not return.

Could you please clarify:

1. Are FileOpen, FileWriteString, FileFlush, FileClose, FileMove, FileCopy, FileReadArray, FileReadString, and FileIsEnding guaranteed to return within a documented maximum duration?

2. Can an MQL5 file operation that has not returned be interrupted or cancelled safely?

3. Does the documented forced completion after a stop command guarantee that the blocked call returns to its caller? What guarantees exist regarding partially written files?

4. Is there an officially supported mechanism for enforcing a strict deadline in this situation?

Please provide official documentation references where available.

Thank you.