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glTF 2.0 Validation Issues

IoError

Code Message Severity
IO_ERROR %1 Error

SchemaError

Code Message Severity
ARRAY_LENGTH_NOT_IN_LIST Invalid array length %1. Valid lengths are: ('%a', '%b', '%c'). Error
ARRAY_TYPE_MISMATCH Type mismatch. Array element '%1' is not a '%2'. Error
DUPLICATE_ELEMENTS Duplicate element. Error
EMPTY_ENTITY Entity cannot be empty. Error
INVALID_INDEX Index must be a non-negative integer. Error
INVALID_JSON Invalid JSON data. Parser output: %1 Error
INVALID_URI Invalid URI '%1'. Parser output: %2 Error
ONE_OF_MISMATCH Exactly one of ('%1', '%2', '%3', '%4', '%5') properties must be defined. Error
PATTERN_MISMATCH Value '%1' does not match regexp pattern '%2'. Error
TYPE_MISMATCH Type mismatch. Property value '%1' is not a '%2'. Error
UNDEFINED_PROPERTY Property '%1' must be defined. Error
UNEXPECTED_PROPERTY Unexpected property. Warning
UNSATISFIED_DEPENDENCY Dependency failed. '%1' must be defined. Error
VALUE_MULTIPLE_OF Value %1 is not a multiple of %2. Error
VALUE_NOT_IN_LIST Invalid value '%1'. Valid values are ('%a', '%b', '%c'). Warning
VALUE_NOT_IN_RANGE Value %1 is out of range. Error

SemanticError

Code Message Severity
ACCESSOR_MATRIX_ALIGNMENT Matrix accessors must be aligned to 4-byte boundaries. Error
ACCESSOR_NORMALIZED_INVALID Only (u)byte and (u)short accessors can be normalized. Error
ACCESSOR_OFFSET_ALIGNMENT Offset %1 is not a multiple of componentType length %2. Error
ACCESSOR_SPARSE_COUNT_OUT_OF_RANGE Sparse accessor overrides more elements (%1) than the base accessor contains (%2). Error
ANIMATION_CHANNEL_TARGET_NODE_SKIN Animated TRS properties will not affect a skinned mesh. Warning
ASSET_MIN_VERSION_GREATER_THAN_VERSION Asset minVersion '%1' is greater than version '%2'. Error
BUFFER_DATA_URI_MIME_TYPE_INVALID Data URI media type must be 'application/octet-stream' or 'application/gltf-buffer'. Found '%1' instead. Error
BUFFER_VIEW_INVALID_BYTE_STRIDE Only buffer views with raw vertex data can have byteStride. Error
BUFFER_VIEW_TOO_BIG_BYTE_STRIDE Buffer view's byteStride (%1) is greater than byteLength (%2). Error
CAMERA_XMAG_YMAG_NEGATIVE xmag and ymag should not be negative. Warning
CAMERA_XMAG_YMAG_ZERO xmag and ymag must not be zero. Error
CAMERA_YFOV_GEQUAL_PI yfov should be less than Pi. Warning
CAMERA_ZFAR_LEQUAL_ZNEAR zfar must be greater than znear. Error
EXTRA_PROPERTY This property should not be defined as it will not be used. Information
INVALID_EXTENSION_NAME_FORMAT Extension name has invalid format. Warning
INVALID_GL_VALUE Invalid value %1 for GL type '%2'. Error
KHR_LIGHTS_PUNCTUAL_LIGHT_SPOT_ANGLES outerConeAngle (%2) is less than or equal to innerConeAngle (%1). Error
KHR_MATERIALS_EMISSIVE_STRENGTH_ZERO_FACTOR Emissive strength has no effect when the emissive factor is zero or undefined. Warning
KHR_MATERIALS_IRIDESCENCE_THICKNESS_RANGE_INVALID Thickness maximum must be greater than or equal to the thickness minimum. Error
KHR_MATERIALS_IRIDESCENCE_THICKNESS_RANGE_WITHOUT_TEXTURE Thickness minimum has no effect when a thickness texture is not defined. Information
KHR_MATERIALS_IRIDESCENCE_THICKNESS_TEXTURE_UNUSED Thickness texture has no effect when the thickness minimum is equal to the thickness maximum. Information
KHR_MATERIALS_VOLUME_DOUBLE_SIDED The volume extension should not be used with double-sided materials. Warning
KHR_MATERIALS_VOLUME_NO_TRANSMISSION The volume extension needs to be combined with an extension that allows light to transmit through the surface. Warning
MATERIAL_ALPHA_CUTOFF_INVALID_MODE Alpha cutoff is supported only for 'MASK' alpha mode. Warning
MESH_INVALID_WEIGHTS_COUNT The length of weights array (%1) does not match the number of morph targets (%2). Error
MESH_PRIMITIVES_UNEQUAL_TARGETS_COUNT All primitives must have the same number of morph targets. Error
MESH_PRIMITIVE_INDEXED_SEMANTIC_CONTINUITY Indices for indexed attribute semantic '%1' must start with 0 and be continuous. Total expected indices: %2, total provided indices: %3. Error
MESH_PRIMITIVE_INVALID_ATTRIBUTE Invalid attribute name. Error
MESH_PRIMITIVE_JOINTS_WEIGHTS_MISMATCH Number of JOINTS attribute semantics (%1) does not match the number of WEIGHTS (%2). Error
MESH_PRIMITIVE_NO_POSITION No POSITION attribute found. Warning
MESH_PRIMITIVE_TANGENT_WITHOUT_NORMAL TANGENT attribute without NORMAL found. Warning
MULTIPLE_EXTENSIONS This extension may be incompatible with other extensions for the object. Warning
NODE_EMPTY Empty node encountered. Information
NODE_MATRIX_DEFAULT Do not specify default transform matrix. Information
NODE_MATRIX_NON_TRS Matrix must be decomposable to TRS. Error
NODE_MATRIX_TRS A node can have either a matrix or any combination of translation/rotation/scale (TRS) properties. Error
NODE_SKINNED_MESH_LOCAL_TRANSFORMS Local transforms will not affect a skinned mesh. Warning
NODE_SKINNED_MESH_NON_ROOT Node with a skinned mesh is not root. Parent transforms will not affect a skinned mesh. Warning
NODE_SKIN_NO_SCENE A node with a skinned mesh is used in a scene that does not contain joint nodes. Error
NON_OBJECT_EXTRAS Prefer JSON Objects for extras. Information
NON_RELATIVE_URI Non-relative URI found: '%1'. Warning
NON_REQUIRED_EXTENSION Extension '%1' cannot be optional. Error
ROTATION_NON_UNIT Rotation quaternion must be normalized. Error
SKIN_NO_COMMON_ROOT Joints do not have a common root. Error
SKIN_SKELETON_INVALID Skeleton node is not a common root. Error
UNKNOWN_ASSET_MAJOR_VERSION Unknown glTF major asset version: %1. Error
UNKNOWN_ASSET_MINOR_VERSION Unknown glTF minor asset version: %1. Warning
UNRESERVED_EXTENSION_PREFIX Extension uses unreserved extension prefix '%1'. Warning
UNUSED_EXTENSION_REQUIRED Unused extension '%1' cannot be required. Error

LinkError

Code Message Severity
ACCESSOR_SMALL_BYTESTRIDE Referenced bufferView's byteStride value %1 is less than accessor element's length %2. Error
ACCESSOR_TOO_LONG Accessor (offset: %1, length: %2) does not fit referenced bufferView [%3] length %4. Error
ACCESSOR_TOTAL_OFFSET_ALIGNMENT Accessor's total byteOffset %1 isn't a multiple of componentType length %2. Error
ACCESSOR_USAGE_OVERRIDE Override of previously set accessor usage. Initial: '%1', new: '%2'. Error
ANIMATION_CHANNEL_TARGET_NODE_MATRIX Animation channel cannot target TRS properties of a node with defined matrix. Error
ANIMATION_CHANNEL_TARGET_NODE_WEIGHTS_NO_MORPHS Animation channel cannot target WEIGHTS when mesh does not have morph targets. Error
ANIMATION_DUPLICATE_TARGETS Animation channel has the same target as channel %1. Error
ANIMATION_SAMPLER_ACCESSOR_WITH_BYTESTRIDE bufferView.byteStride must not be defined for buffer views used by animation sampler accessors. Error
ANIMATION_SAMPLER_INPUT_ACCESSOR_INVALID_FORMAT Invalid Animation sampler input accessor format '%1'. Must be one of ('%a', '%b', '%c'). Error
ANIMATION_SAMPLER_INPUT_ACCESSOR_TOO_FEW_ELEMENTS Animation sampler output accessor with '%1' interpolation must have at least %2 elements. Got %3. Error
ANIMATION_SAMPLER_INPUT_ACCESSOR_WITHOUT_BOUNDS accessor.min and accessor.max must be defined for animation input accessor. Error
ANIMATION_SAMPLER_OUTPUT_ACCESSOR_INVALID_COUNT Animation sampler output accessor of count %1 expected. Found %2. Error
ANIMATION_SAMPLER_OUTPUT_ACCESSOR_INVALID_FORMAT Invalid animation sampler output accessor format '%1' for path '%3'. Must be one of ('%a', '%b', '%c'). Error
BUFFER_MISSING_GLB_DATA Buffer refers to an unresolved GLB binary chunk. Error
BUFFER_VIEW_TARGET_MISSING bufferView.target should be set for vertex or index data. Hint
BUFFER_VIEW_TARGET_OVERRIDE Override of previously set bufferView target or usage. Initial: '%1', new: '%2'. Error
BUFFER_VIEW_TOO_LONG BufferView does not fit buffer (%1) byteLength (%2). Error
IMAGE_BUFFER_VIEW_WITH_BYTESTRIDE bufferView.byteStride must not be defined for buffer views containing image data. Error
INVALID_IBM_ACCESSOR_COUNT IBM accessor must have at least %1 elements. Found %2. Error
KHR_MATERIALS_VARIANTS_NON_UNIQUE_VARIANT This variant is used more than once for this mesh primitive. Error
MESH_PRIMITIVE_ACCESSOR_UNALIGNED Vertex attribute data must be aligned to 4-byte boundaries. Error
MESH_PRIMITIVE_ACCESSOR_WITHOUT_BYTESTRIDE bufferView.byteStride must be defined when two or more accessors use the same buffer view. Error
MESH_PRIMITIVE_ATTRIBUTES_ACCESSOR_INVALID_FORMAT Invalid accessor format '%1' for this attribute semantic. Must be one of ('%a', '%b', '%c'). Error
MESH_PRIMITIVE_ATTRIBUTES_ACCESSOR_UNSIGNED_INT Mesh attributes cannot use UNSIGNED_INT component type. Error
MESH_PRIMITIVE_INCOMPATIBLE_MODE Number of vertices or indices (%1) is not compatible with used drawing mode ('%2'). Warning
MESH_PRIMITIVE_INDICES_ACCESSOR_INVALID_FORMAT Invalid indices accessor format '%1'. Must be one of ('%a', '%b', '%c'). Error
MESH_PRIMITIVE_INDICES_ACCESSOR_WITH_BYTESTRIDE bufferView.byteStride must not be defined for indices accessor. Error
MESH_PRIMITIVE_MORPH_TARGET_INVALID_ATTRIBUTE_COUNT Base accessor has different count. Error
MESH_PRIMITIVE_MORPH_TARGET_NO_BASE_ACCESSOR The mesh primitive does not define this attribute semantic. Error
MESH_PRIMITIVE_POSITION_ACCESSOR_WITHOUT_BOUNDS accessor.min and accessor.max must be defined for POSITION attribute accessor. Error
MESH_PRIMITIVE_TOO_FEW_TEXCOORDS Material is incompatible with mesh primitive: Texture binding '%1' needs 'TEXCOORD_%2' attribute. Error
MESH_PRIMITIVE_UNEQUAL_ACCESSOR_COUNT All accessors of the same primitive must have the same count. Error
NODE_LOOP Node is a part of a node loop. Error
NODE_PARENT_OVERRIDE Value overrides parent of node %1. Error
NODE_SKINNED_MESH_WITHOUT_SKIN Node uses skinned mesh, but has no skin defined. Warning
NODE_SKIN_WITH_NON_SKINNED_MESH Node has skin defined, but mesh has no joints data. Error
NODE_WEIGHTS_INVALID The length of weights array (%1) does not match the number of morph targets (%2). Error
SCENE_NON_ROOT_NODE Node %1 is not a root node. Error
SKIN_IBM_ACCESSOR_WITH_BYTESTRIDE bufferView.byteStride must not be defined for buffer views used by inverse bind matrices accessors. Error
SKIN_IBM_INVALID_FORMAT Invalid IBM accessor format '%1'. Must be one of ('%a', '%b', '%c'). Error
TEXTURE_INVALID_IMAGE_MIME_TYPE Invalid MIME type '%1' for the texture source. Valid MIME types are ('%a', '%b', '%c'). Error
UNDECLARED_EXTENSION Extension is not declared in extensionsUsed. Error
UNEXPECTED_EXTENSION_OBJECT Unexpected location for this extension. Error
UNRESOLVED_REFERENCE Unresolved reference: %1. Error
UNSUPPORTED_EXTENSION Cannot validate an extension as it is not supported by the validator: '%1'. Information
UNUSED_MESH_TANGENT Tangents are not used because the material has no normal texture. Information
UNUSED_MESH_WEIGHTS The static morph target weights are always overridden. Information
UNUSED_OBJECT This object may be unused. Information

DataError

Code Message Severity
ACCESSOR_ANIMATION_INPUT_NEGATIVE Animation input accessor element at index %1 is negative: %2. Error
ACCESSOR_ANIMATION_INPUT_NON_INCREASING Animation input accessor element at index %1 is less than or equal to previous: %2 <= %3. Error
ACCESSOR_ANIMATION_SAMPLER_OUTPUT_NON_NORMALIZED_QUATERNION Animation sampler output accessor element at indices %1..%2 is not of unit length: %3. Error
ACCESSOR_ELEMENT_OUT_OF_MAX_BOUND Accessor contains %1 element(s) greater than declared maximum value %2. Error
ACCESSOR_ELEMENT_OUT_OF_MIN_BOUND Accessor contains %1 element(s) less than declared minimum value %2. Error
ACCESSOR_INDEX_OOB Indices accessor element at index %1 has value %2 that is greater than the maximum vertex index available (%3). Error
ACCESSOR_INDEX_PRIMITIVE_RESTART Indices accessor contains primitive restart value (%1) at index %2. Error
ACCESSOR_INDEX_TRIANGLE_DEGENERATE Indices accessor contains %1 degenerate triangles (out of %2). Information
ACCESSOR_INVALID_FLOAT Accessor element at index %1 is %2. Error
ACCESSOR_INVALID_IBM Matrix element at index %1 (component index %2) contains invalid value: %3. Error
ACCESSOR_INVALID_SIGN Vector3 with sign at accessor indices %1..%2 has invalid w component: %3. Must be 1.0 or -1.0. Error
ACCESSOR_JOINTS_INDEX_DUPLICATE Joints accessor element at index %1 (component index %2) has value %3 that is already in use for the vertex. Error
ACCESSOR_JOINTS_INDEX_OOB Joints accessor element at index %1 (component index %2) has value %3 that is greater than the maximum joint index (%4) set by skin %5. Error
ACCESSOR_JOINTS_USED_ZERO_WEIGHT Joints accessor element at index %1 (component index %2) is used with zero weight but has non-zero value (%3). Warning
ACCESSOR_MAX_MISMATCH Declared maximum value for this component (%1) does not match actual maximum (%2). Error
ACCESSOR_MIN_MISMATCH Declared minimum value for this component (%1) does not match actual minimum (%2). Error
ACCESSOR_NON_CLAMPED Accessor element at index %1 is not clamped to 0..1 range: %2. Error
ACCESSOR_SPARSE_INDEX_OOB Accessor sparse indices element at index %1 is greater than or equal to the number of accessor elements: %2 >= %3. Error
ACCESSOR_SPARSE_INDICES_NON_INCREASING Accessor sparse indices element at index %1 is less than or equal to previous: %2 <= %3. Error
ACCESSOR_VECTOR3_NON_UNIT Vector3 at accessor indices %1..%2 is not of unit length: %3. Error
ACCESSOR_WEIGHTS_NEGATIVE Weights accessor element at index %1 (component index %2) has negative value %3. Error
ACCESSOR_WEIGHTS_NON_NORMALIZED Weights accessor elements (at indices %1..%2) have non-normalized sum: %3. Error
BUFFER_BYTE_LENGTH_MISMATCH Actual data byte length (%1) is less than the declared buffer byte length (%2). Error
BUFFER_GLB_CHUNK_TOO_BIG GLB-stored BIN chunk contains %1 extra padding byte(s). Warning
DATA_URI_GLB Data URI is used in GLB container. Warning
IMAGE_DATA_INVALID Image data is invalid. %1 Error
IMAGE_FEATURES_UNSUPPORTED Image contains unsupported features like non-default colorspace information, non-square pixels, or animation. Warning
IMAGE_MIME_TYPE_INVALID Recognized image format '%1' does not match declared image format '%2'. Error
IMAGE_NON_ENABLED_MIME_TYPE '%1' MIME type requires an extension. Error
IMAGE_NPOT_DIMENSIONS Image has non-power-of-two dimensions: %1x%2. Information
IMAGE_UNEXPECTED_EOS Unexpected end of image stream. Error
IMAGE_UNRECOGNIZED_FORMAT Image format not recognized. Warning
URI_GLB URI is used in GLB container. Information

GlbError

Code Message Severity
GLB_CHUNK_LENGTH_UNALIGNED Length of %1 chunk is not aligned to 4-byte boundaries. Error
GLB_CHUNK_TOO_BIG Chunk (%1) length (%2) does not fit total GLB length. Error
GLB_DUPLICATE_CHUNK Chunk of type %1 has already been used. Error
GLB_EMPTY_BIN_CHUNK Empty BIN chunk should be omitted. Information
GLB_EMPTY_CHUNK Chunk (%1) cannot have zero length. Error
GLB_EXTRA_DATA Extra data after the end of GLB stream. Warning
GLB_INVALID_MAGIC Invalid GLB magic value (%1). Error
GLB_INVALID_VERSION Invalid GLB version value %1. Error
GLB_LENGTH_MISMATCH Declared length (%1) does not match GLB length (%2). Error
GLB_LENGTH_TOO_SMALL Declared GLB length (%1) is too small. Error
GLB_UNEXPECTED_BIN_CHUNK BIN chunk must be the second chunk. Error
GLB_UNEXPECTED_END_OF_CHUNK_DATA Unexpected end of chunk data. Error
GLB_UNEXPECTED_END_OF_CHUNK_HEADER Unexpected end of chunk header. Error
GLB_UNEXPECTED_END_OF_HEADER Unexpected end of header. Error
GLB_UNEXPECTED_FIRST_CHUNK First chunk must be of JSON type. Found %1 instead. Error
GLB_UNKNOWN_CHUNK_TYPE Unknown GLB chunk type: %1. Warning