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Date/Time: Tue, 06 Oct 2026 20:22:21 +0000



Post From: Repeated historical download failures — ESZ24-CME, Windows error 10053

[2026-10-06 18:23:00]
User444134 - Posts: 2
Hello,

I am using Sierra Chart version 2957 with SC Data - All Services to download individual expired ES futures contracts at 1-tick resolution.

ESZ24-CME historical downloads repeatedly disconnect, commonly after 39–40 seconds, with Windows error 10053 and “The network socket has been closed.”

The attached log shows:

Failures across ds28, ds32 and ds37 on ports 10149/10150.

Repeated disconnections of the delayed data feed as well.

Port 80 was tested: 96 requests received zero records. It has been disabled again.

ESU24 previously received approximately 69.3 million records in one successful request.

ESZ24 last recorded timestamp: 2024-07-24 09:40:11.200000.

Historical download encryption was requested in settings, but the log does not show TLS/encryption confirmation.

Could you review the log and recommend the next diagnostic step? Please also confirm how to verify that historical download encryption is active in this version.

I need to preserve existing data and 1-tick resolution.