Support Board
Date/Time: Mon, 18 May 2026 00:50:22 +0000
Regression in ACSIL DLL Execution and OpenGL Rendering in Version 2904
View Count: 46
| [2026-05-17 17:19:46] |
| User732871 - Posts: 7 |
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Date Time Of Last Edit: 2026-05-17 17:24:47
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| [2026-05-17 17:24:08] |
| User732871 - Posts: 7 |
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Hello Sierra Chart Support, I need assistance with a reproducible issue in the latest Sierra Chart version (2904) where ACSIL custom studies (DLL‑based) load successfully but do not execute or plot anything on the chart. Critical detail These exact same DLLs, chartbooks, and symbols work perfectly in Sierra Chart version 2878 on the same machine. No changes to Windows, hardware, antivirus, or configuration — only the Sierra Chart version is different. This strongly indicates a regression or compatibility change inside Sierra Chart, not an external or Windows‑related issue. 1. ACSIL DLL Studies Not Plotting in 2904 DLLs load successfully (confirmed in Message Log). Studies appear in the “Add Custom Study” window. Study settings open normally. But nothing plots on the chart. No errors or warnings appear. Example from the log: Code Loading DLL: dynsupplyanddemandzones_64.dll Loading DLL: OrderFlowLabs.com.free_64.dll Loading DLL: VolumeTriggersPRO_64.dll Important detail Within the same DLL bundle, some studies do plot while others do not. For example, in the ZYP Free study bundle, certain studies work normally, while others fail silently. This confirms: The DLLs load correctly The ACSIL interface is partially functional The issue is internal to Sierra Chart’s handling of specific ACSIL study functions in newer builds 2. OpenGL Rendering Issues (Regression) When OpenGL is enabled in version 2904: A. Chartbooks open with missing title bars Charts open without title bars, even though “Show Title Bar” is enabled. The title bar is pre‑selected but not visible until manually dragged. B. Mouse cursor is not aligned with the crosshair The cursor and crosshair become desynchronized, making chart interaction inaccurate. C. When OpenGL is disabled, Sierra Chart becomes extremely slow Non‑OpenGL mode is significantly slower than in version 2878. These behaviors: Did not occur in version 2878 Are not caused by Windows Are reproducible across clean installations Indicate an internal rendering pipeline issue 3. Environment Clean installation in a new folder Default settings Default chartbooks No imported configurations Tested with SC Data and Denali Tested on multiple symbols (NQM26, MESM26, EURUSD, etc.) Same behavior across all tests 4. Clarification The message: Code Historical data for NQM26-CME is delayed because connection to main data feed is not present. is expected when the market is closed and is not related to the custom study issue. Request Please investigate why: ACSIL DLL studies that work correctly in version 2878 fail to execute or draw anything in version 2904, despite loading successfully and showing no errors. OpenGL mode causes missing title bars and mouse‑crosshair desynchronization, and Non‑OpenGL mode is significantly slower than in older versions. These issues appear to be regressions introduced in recent builds. I can provide full logs, chartbooks, or DLLs if needed. Thank you, George |
| [2026-05-17 21:25:07] |
| Sierra_Chart Engineering - Posts: 23794 |
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Regarding this: I need assistance with a reproducible issue in the latest Sierra Chart version (2904) where ACSIL custom studies (DLL‑based) load successfully but do not execute or plot anything on the chart. Refer to the what is new notes here: https://www.sierrachart.com/index.php?page=doc/Whats_New.php#SCVer2903 Rebuild your custom studies due to some changes with datatypes from int/float to double. A. Chartbooks open with missing title bars
Charts open without title bars, even though “Show Title Bar” is enabled. The title bar is pre‑selected but not visible until manually dragged. B. Mouse cursor is not aligned with the crosshair The cursor and crosshair become desynchronized, making chart interaction inaccurate. C. When OpenGL is disabled, Sierra Chart becomes extremely slow Non‑OpenGL mode is significantly slower than in version 2878. Regarding these first thing we want to do is to run Sierra Chart in Safe Mode: Sierra Chart - Software Login Instructions: Using Safe Mode This could not be true: Non‑OpenGL mode is significantly slower than in version 2878.
It makes no sense. There are no changes related to this. We do not observe any such problem. There is some other explanation in your particular case.We will check on the issues you have with OpenGL but that does not make sense. We do not have any other reports of these. Also refer to: High CPU Usage | Inactive User Interface | Poor Performance | Long Time to Load Chart Data | Charts Reloading Often: 30.44 - Performance Differences Between Versions of Sierra Chart Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing |
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