Support Board
Date/Time: Sat, 14 Mar 2026 18:58:32 +0000
Custom Chart Builder: version 2870
View Count: 274
| [2026-01-27 09:58:25] |
| User907968 - Posts: 866 |
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Custom chart builder in version 2870 appear to break compatibility with studies compiled on earlier versions. Studies appears to load correctly, but in some confgurations fail silently - the chart is blank and no error messages are emitted (to log) to indicate a failure. With a debugger attached, I consistently observe access violations originating from methods of s_CustomChartBarInterface, including GetPersistentInt, GetPersistentFloat, GetPersistentDouble, FormattedEvaluate and GetInput. In all cases, the failures appear to stem from interactions that depend on the internal m_p_LoadingDataObject pointer. Representative exceptions observed: Exception thrown at 0x00000001404D3402 in SierraChart_64.exe: 0xC0000005: Access violation reading location 0xFFFFFFFFFFFFFFFF. Exception thrown: read access violation. **this** was 0xFFFFFFFFFFFFFFE7. These exceptions repeat across multiple calls and functions, indicating an invalid internal object pointer rather than an isolated logic error. In version 2870, a new member (Internal_GetPersistentPointer) is inserted before m_p_LoadingDataObject, resulting in m_p_LoadingDataObject having a different byte offset compared to earlier versions. |
| [2026-01-27 16:53:35] |
| User719512 - Posts: 425 |
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Hi User907968, I wondered how that change was not "breaking" or rather would not cause incompatibility with older/existing studies when that was not put at the bottom of the s_CustomChartBarInterface structure. <my own ramblings> One fix seems to be recompiling affected studies and ensure all consumers move to v2870+. I suppose alternatively, could move that to the end, make a compatible 2871 and make 2870 a blocked build and inform anyone who compiled against 2870 specifically using s_CustomChartBarInterface to recompile for 2871+. </my own ramblings> I am sure Sierra Engineering is on top of this and way ahead of anything I pondered above for best path forward for existing and new studies... |
| [2026-01-28 06:49:52] |
| Sierra_Chart Engineering - Posts: 23212 |
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We apologize for this. We did not maintain back compatibility. We will fix this.
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 |
| [2026-01-29 00:47:28] |
| Sierra_Chart Engineering - Posts: 23212 |
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A new release is coming out this evening to resolve. If you have already recompiled on 2870, will need to recompile again on 2871.
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: 2026-01-29 00:47:52
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| [2026-01-29 14:01:28] |
| User907968 - Posts: 866 |
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I see it is done, thank you for that, appreciated!
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