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Post by carolynjanet747 on Advice on OOP hardware I/O code structure ^{CODESYS Forge talk (Post)}
This was a very engaging and well-written blog post, and I really appreciated how clearly the ideas were explained. The content is informative and easy to follow, making it valuable for readers from different backgrounds. Students facing urgent deadlines can explore Last Minute Assignment Help for guidance with research, structure, referencing, proofreading, and final checks while maintaining the quality of their academic work. Keep up the great work and continue sharing such helpful content!
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Post by alicecastle0003 on Advice on OOP hardware I/O code structure ^{CODESYS Forge talk (Post)}
This is a helpful and informative post. The points shared are practical and easy to understand, especially for students who are trying to manage their studies and deadlines. For those who need additional academic guidance, assignment help Melbourne can also be a useful option for staying organized and understanding difficult topics.
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Advice on OOP hardware I/O code structure ^{CODESYS Forge talk (Thread)}
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Exception handler return value purpose in _CODESYS 3.5 ^{CODESYS Forge talk (Thread)}
Exception handler return value purpose in _CODESYS 3.5
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Post by hluecke on Codesys Virtual Safe Control startet nicht (mehr) ^{CODESYS Forge talk (Post)}
Hallo, ich versuche seit einiger Zeit eine virtuelle Codesys Control für Linux in Verbindung mit einer Virtual Safe Control ans Laufen zu bringen. Seit zwei Tagen, ohne dass eine Änderung gemacht wurde (auch keine Betriebssystem Updates), startet die Safe Control gar nicht mehr und ich erhalte die Fehlermeldung "Eine Ausnahme vom Typ "CODESYS.VirtualPlcCommunicator.VirtualApiException" wurde ausgelöst". Wenn man in den Operationen die VPLC manuell startet, wird sie als laufend angezeigt, bis man aktualisiert. Ich habe die Packages schon neu installiert und auf die aktuellste Version upgedated, keine Änderung. Ein Log lässt sich nicht abrufen. Hat jemand Erfahrung, was dieser Fehler bedeutet und wie man ihn beheben kann?
Last updated: 2026-09-01

Post by dclements on Feature Request: Read-Only References / Pointer-to-Const Support ^{CODESYS Forge talk (Post)}
I would like to suggest adding support for persistent read-only references or pointers in CODESYS, similar to a C++ pointer-to-const (const T*). For example, something conceptually similar to: POINTER TO CONSTANT ST_MyData or REFERENCE TO CONSTANT ST_MyData The important distinction is that the reference itself may still be passed around or reassigned, but the referenced object cannot be modified through that reference. CODESYS currently supports VAR_IN_OUT CONSTANT, which provides read-only reference semantics for parameters, but there does not appear to be an equivalent type that can be stored in a variable or returned from a method. A practical use case is a registry that owns long-lived definitions. The registry needs to retain ownership of the data while downstream systems maintain persistent references to it. Currently, the main options are: Return the struct by value, which loses reference semantics and requires a copy. Return POINTER TO ST_Definition, which allows consumers to modify registry-owned data. Convert the structure into a Function Block and expose a getter-only interface, which provides the desired encapsulation but introduces more complexity and memory overhead. A read-only reference/pointer type would allow libraries to expose persistent, zero-copy access to internally owned data while preserving encapsulation. This would be particularly useful for library APIs and object-oriented CODESYS architectures where ownership of data should remain with one component while other components are allowed to observe it. Similar requests for constant references/pointers have been discussed on CODESYS Forge previously, so this appears to be a recurring use case rather than something specific to one application.
Last updated: 2026-09-01

Feature Request: Read-Only References / Pointer-to-Const Support ^{CODESYS Forge talk (Thread)}
Feature Request: Read-Only References / Pointer-to-Const Support
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Post by oscardelmagno on Codesys v3.5.22.10 - Internal error:System.AggregateException...Value cannot be null...Parameter name: expLValue ^{CODESYS Forge talk (Post)}
actualy I've solved the problem by creating a new project and copying the file.
Last updated: 2026-09-01

Codesys v3.5.22.10 - Internal error:System.AggregateException...Value cannot be null...Parameter name: expLValue ^{CODESYS Forge talk (Thread)}
Codesys v3.5.22.10 - Internal error:System.AggregateException...Value cannot be null...Parameter name: expLValue
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