ErrLookup › mermaid-js/mermaid

mermaid-js/mermaid

Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown · TypeScript · 596 source files

Analyzed at d93e9c88c0 on 2026-08-12. 95 documented errors.

Code / Message	Type	Severity	Tags
Parsing failed	validation	error	parser, langium, syntax, mermaid, ast
Error: State name must be a single word. Found	exception	error	state-diagram, jison, lexer, syntax, mermaid
parser.parser?.yy was not a PacketDB. This is due to a bug…	exception	error	mermaid, packet, parsing, internal-invariant, integration
union requires multiple identifiers	exception	error	venn, jison, grammar, syntax, mermaid
text requires set	exception	error	venn, jison, grammar, syntax, mermaid
Line definition not found	exception	error	mermaid, gitgraph, rendering, geometry, internal-invariant
Could not find a suitable point for the given distance	exception	error	utils, geometry, edges, render
Position not found for branch	exception	error	mermaid, gitgraph, rendering, internal-invariant
Could not calculate intersection points for rel	exception	error	c4, relationship, geometry, render-time
The left-hand id [ ] is modified to traverse the group…	validation	error	architecture, edge, group-boundary, validation
Architecture layout failed: a declared `align row\|column`…	exception	error	architecture, layout, fcose, constraint-conflict, render-time
Commit positions not found for commits	exception	error	mermaid, gitgraph, rendering, data-integrity
C4 shape " " has no intersect function. Please report this…	exception	error	c4, shape, internal, bug, relationship
Items without section detected, found section	exception	error	mermaid, kanban, parsing, data-integrity
Sandbox iframe #i is missing its content document	exception	error	sandbox, security, dom, iframe, render
Class not found	exception	error	class, lookup, reference, sanitization
Groups within groups are not allowed in Kanban diagrams	exception	error	mermaid, kanban, rendering, internal-invariant
Unknown diagram type	validation	error	parser, validation, diagram-type, registry
Axes must be populated before curves for reference entries	exception	error	radar, ordering, diagram-db, api-misuse
Block start is greater than block end .	exception	error	mermaid, packet, parsing, internal-invariant
C4: no shape handler for	exception	error	c4, shape, internal, renderer
Invalid icon name	validation	error	icons, validation, iconify, rendering
No nodes found in layout data	validation	error	layout, validation, tidy-tree, nodes
Nodes and querySelector are both undefined	exception	error	mermaid-api, run, options, dom, validation
No nodes available to create tree	validation	error	layout, tidy-tree, defensive, nodes
No such shape: . Shape names should be lowercase.	exception	error	mermaid, kanban, parsing, validation
svg element not in render tree	exception	error	utils, dom, ssr, jsdom, text-measurement
State not found	exception	error	state, internal-invariant, concurrency, diagram-db
Failed to load icon set	exception	error	icons, network, iconify, async, loader
Icon set not found	exception	error	icons, configuration, iconify, registry
start should have been set during first phase	exception	error	mermaid, packet, parsing, internal-invariant
Layout data is required	validation	error	layout, cose-bilkent, validation, internal
Edges array is required in layout data	validation	error	layout, cose-bilkent, validation, graph
Invalid icon loader. Must have either "icons" or "loader"…	validation	error	icons, configuration, registericonpacks, validation
value for is invalid, please use a valid hex code	validation	error	mermaid, quadrant-chart, parsing, validation
value for is invalid, please use a valid number of pixels…	validation	error	mermaid, quadrant-chart, parsing, validation
must be between 0-1 (decimal) or 0-100 (percentage)…	validation	error	wardley, coordinates, range, validation, units
Position must be a non-negative integer.	validation	error	block, layout, validation, grid
Unknown layout algorithm	validation	error	layout, render, configuration, registry
value for is invalid, please use a valid number	validation	error	mermaid, quadrant-chart, parsing, validation
Packet block is invalid. Cannot have a zero bit field.	exception	error	mermaid, packet, parsing, validation
The service id [ ] is already in use by another	validation	error	architecture, mermaid, validation, duplicate-id, service
The given radii are too small to create an arc between the…	exception	error	shapes, geometry, bow-tie, render
There can be only one root. No parent could be found for	exception	error	mermaid, mindmap, parsing, data-integrity
The group [ ]'s parent is not a group	validation	error	architecture, hierarchy, type-mismatch, group
Missing entry for axis	exception	error	radar, missing-data, diagram-db, validation
Edge limit exceeded.	exception	error
Both layout algorithms	exception	error	layout, render, registry, configuration
Diagrams beginning with --- are not valid. If you were…	validation	error	mermaid, front-matter, yaml, diagram, parse
align references [ ], which is not a service or junction	validation	error	architecture, layout, align, type-mismatch
Line : Unexpected indentation without box-drawing…	validation	error	treeview, box-drawing, preprocessor, mixed-format, indentation
An align directive requires at least two members; got	validation	error	architecture, layout, align, validation
The right-hand id [ ] is modified to traverse the group…	validation	error	architecture, edge, group-boundary, validation
Packet block - is invalid. End must be greater than start.	exception	error	mermaid, packet, parsing, validation
The group [ ]'s parent does not exist. Please make sure the…	validation	error	architecture, hierarchy, ordering, group
No such shape: . Please check your syntax.	validation	error	render, shapes, nodes, validation
It is not possible to have actors with the same id, even if…	exception	error	sequence, participant, create, duplicate-id, validation
Packet block - is not contiguous. It should start from .	exception	error	mermaid, packet, parsing, validation
Group nodes can only have label. Remove the additional…	exception	error	state, composite-node, label, validation
No diagram type detected matching given configuration for…	validation	error	mermaid, detection, diagram, unknown-diagram
Line : Empty node — expected a filename or directory name…	validation	error	treeview, box-drawing, preprocessor, empty-node, validation
C4 rel " " -> " " references an unknown shape	exception	error	c4, relationship, reference, alias
Columns must be an integer !== 0.	validation	error	block, layout, validation, grid
" " has invalid value: . Negative values are not allowed in…	exception	error	mermaid, pie, parsing, validation
Icon name must contain a prefix	validation	error	icons, validation, iconify, configuration
Invalid icon loader. Must have a "name" property with…	validation	error	icons, configuration, registericonpacks, validation
A same participant should only be defined in one Box	exception	error	sequence, participant, box, conflict, validation
Diagram not found.	exception	error	mermaid, diagram, registry, loader, unknown-diagram
Failed to load external diagrams	exception	error	mermaid, loader, external-diagram, network, dynamic-import
Invalid direction given for left hand side of edge	validation	error	architecture, edge, validation, direction
Icon not found	exception	error	icons, iconify, validation, rendering
The junction id [ ] is already in use by another	validation	error	architecture, mermaid, validation, duplicate-id, junction
Pipeline " " must reference an existing component with…	exception	error	wardley, pipeline, missing-reference, coordinates, validation
unknown set identifier	validation	error	venn, set-identifier, validation, ordering
The left-hand id [ ] does not yet exist. Please create the…	validation	error	architecture, edge, ordering, reference
The created participant	exception	error	sequence, participant, create, message-flow, validation
align lists [ ] more than once	validation	error	architecture, layout, align, duplicate
The group [ ] cannot be placed within itself	validation	error	architecture, hierarchy, validation, group
style named is not supported.	validation	error	mermaid, quadrant-chart, parsing, validation
end should have been set during first phase	exception	error	mermaid, packet, parsing, internal-invariant
Nodes array is required in layout data	validation	error	layout, validation, nodes, type-mismatch
Invalid direction given for right hand side of edge	validation	error	architecture, edge, validation, direction
Configuration is required in layout data	validation	error	layout, validation, config
Node " " is missing coordinates	exception	error	wardley, coordinates, builder, validation
Root node is required	validation	error	layout, cose-bilkent, validation, graph
The destroyed participant	exception	error	sequence, participant, destroy, message-flow, validation
The group id [ ] is already in use by another	validation	error	architecture, mermaid, validation, duplicate-id, group
The service [ ]'s parent does not exist. Please make sure…	validation	error	architecture, mermaid, validation, parent, ordering
The index for linkStyle is out of bounds. Valid indices for…	exception	error
The service [ ] cannot be placed within itself	validation	error	architecture, mermaid, validation, cycle, parent
The service [ ]'s parent is not a group	validation	error	architecture, mermaid, validation, parent, group
The junction [ ]'s parent does not exist. Please make sure…	validation	error	architecture, mermaid, validation, parent, ordering, junction
The junction [ ] cannot be placed within itself	validation	error	architecture, mermaid, validation, cycle, junction
The right-hand id [ ] does not yet exist. Please create the…	validation	error	architecture, edge, ordering, reference
The junction [ ]'s parent is not a group	validation	error	architecture, mermaid, validation, parent, group, junction