Support Board
Date/Time: Wed, 07 Oct 2026 23:15:39 +0000
GetACSDrawingByLineNumber stack corruption v2941/2942
View Count: 274
| [2026-08-23 11:20:11] |
| User907968 - Posts: 884 |
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GetACSDrawingByLineNumber() appears to write beyond the end of an older s_UseTool structure when running under Sierra Chart v2941/2942. The study DLL was compiled against an earlier Sierra Chart header, v2911. Observations: - v2940, the call does not appear write beyond the end of the older s_UseTool. - v2941, one byte at offset 0x402 is modified, i.e. the third byte beyond the end of the older 0x400-byte structure. - The overwritten byte appears to correspond to the new 8-bit 'ShowMiddlePointPrice' field added to s_UseTool in v2941. - Visual Studio detects this as stack corruption because the write modifies the 0xCC debug guard/fill bytes following the stack-allocated s_UseTool. - Testing a Release build of the same study results in immediate process termination when this code path is executed. |
| [2026-08-23 16:41:47] |
| User719512 - Posts: 495 |
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I also see this on an existing study compiled for v2911. Sierra just crashes and closes. This will break a lot of studies and cause a lot of support requests if not patched quickly. tl;dr I see this from a debug build of my v2911 study. Run-Time Check Failure #2 - Stack around the variable 'Tool' was corrupted. triggered by: call _RTC_CheckStackVars (07FFE6EEAD9C8h) |
| [2026-08-23 19:16:29] |
| Sierra_Chart Engineering - Posts: 25097 |
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We will get this resolved. We apologize for this. It was a mistake by one of the programmers and we are going to make sure, that they are not permitted to touch ACSIL structures again. 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 Date Time Of Last Edit: 2026-08-23 19:40:36
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| [2026-08-24 17:33:56] |
| User719512 - Posts: 495 |
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Confirming this is fixed with the updated headers in v2943 which now that Sierra is compiled with, does not try to access ShowMiddlePointPrice unless v2941+. Studies built for v2911 now run as expected. |
| [2026-08-24 17:35:02] |
| User907968 - Posts: 884 |
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We will get this resolved. We apologize for this.
Thank you for the fast fix, appreciated. |
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