| Value | Meaning |
|---|---|
| INVALID_TYPE_FUNCTION0 | A type-func attribute didn’t name a function that returns a #GType. |
| UNHANDLED_TAG1 | The input contained a tag that #GtkBuilder can’t handle. |
| MISSING_ATTRIBUTE2 | An attribute that is required by #GtkBuilder was missing. |
| INVALID_ATTRIBUTE3 | #GtkBuilder found an attribute that it doesn’t understand. |
| INVALID_TAG4 | #GtkBuilder found a tag that it doesn’t understand. |
| MISSING_PROPERTY_VALUE5 | A required property value was missing. |
| INVALID_VALUE6 | #GtkBuilder couldn’t parse some attribute value. |
| VERSION_MISMATCH7 | The input file requires a newer version of GTK+. |
| DUPLICATE_ID8 | An object id occurred twice. |
| OBJECT_TYPE_REFUSED9 | A specified object type is of the same type or derived from the type of the composite class being extended with builder XML. |
| TEMPLATE_MISMATCH10 | The wrong type was specified in a composite class’s template XML |
| INVALID_PROPERTY11 | The specified property is unknown for the object class. |
| INVALID_SIGNAL12 | The specified signal is unknown for the object class. |
| INVALID_ID13 | An object id is unknown |
Error codes that identify various errors that can occur while using #GtkBuilder.