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Hi All I have released a new YAML Parser/Emitter library for Delphi XE2 or later. It is pure delphi code, tested with Win32 and Win64 but it should work for other platforms too (no winapi dependencies). Supports YAML 1.1 (partially) & 1.2 JSONPath queries with filter expressions Multiple Document streams. https://github.com/VSoftTechnologies/VSoft.YAML

Hi @mvanrijnen, there is a JSONNameAttribute you can use to tweak serialization (and deserialization). Just decorate your field with JSONName('') to skip serialization/deserialization. If you need some logic, you can add a special method to your record type and it will be fired by the serialization/deserialization mechanism. The method should match this signature: TMyRecord.ToJSONFilter(const AMember: TRttiMember; const AObj: TJSONObject): Boolean; Just return False and implement your logic in the ToJSONFilter method. It is then up to you to add or not the value of AMember to the AObj that is being serialized. Sincerely, Andrea

You are missing passing TFormatSettings to the StrTo... functions that you are calling - that makes it fail on systems that use a comma as a decimal separator, for example.

As mentioned by @Vincent Parrett - Proper stack traces with EurekaLog, MadExcept or similar, are invaluable in such cases. The cost of buying one of these tools is quickly dwarfed by the cost of the time spent on researching issues without proper insights from said tools.