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Date/Time: Mon, 18 May 2026 01:44:45 +0000



Post From: Regression in ACSIL DLL Execution and OpenGL Rendering in Version 2904

[2026-05-17 21:25:07]
Sierra_Chart Engineering - Posts: 23794
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

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