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erInvalidType

erInvalidType = 2

Example​

function IsInvalidRuntimeType(const ErrorType: TIFException): Boolean;
begin
  Result := ErrorType = erInvalidType;
end;

Usage​

erInvalidType indicates invalid, missing or unsupported Velox scripting value type metadata.

Using the error value​

ExceptionToString returns Invalid Type; the saved parameter normally does not identify the affected type.

During script loading, this error usually indicates incompatible or damaged compiled script data. During execution, it can indicate a Velox scripting defect rather than a recoverable business validation failure.

Capture ExceptionProc, ExceptionPos, the compiled script, the Velox version and the involved declaration before another error replaces them. Do not persist the numeric ordinal; store the member name and formatted message.

  • It is different from the source-code type mismatch diagnostic.
  • Handling the error does not roll back database, dataset, filesystem or external-system effects that already occurred.

Additional Technical Info​

erInvalidType is member ordinal 2 of TIFException, the script-visible declaration that is kept in exact ordinal alignment with PascalScript's runtime TPSError. Its sidebar position 28 is alphabetical navigation metadata and is not its enumeration value.

erInvalidType is used when the loader or executor cannot resolve a valid PascalScript type record. Loader producers include unsupported base-type tags, invalid type references, impossible exported-type metadata and failures to allocate/initialise a declared global type. Runtime producers include operands that refer to a type index outside the loaded type table or an operation whose value category is not supported at that point. It differs from ErTypeMismatch: erInvalidType says the type metadata/reference itself is not valid for the operation, while a mismatch usually involves two otherwise known types that cannot participate together.

Related Code Library entries

External references

Created 2026-07-15