Error codes (all versions)

All errors are in the http://www.w3.org/ns/xproc-error namespace (recommended prefix: err).

Error code	Description
`XC0001`	It is a dynamic error if the value of option `override-content-type` is not a text media type.
`XC0003`	It is a dynamic error if a “`username`” or a “`password`” key is present without specifying a value for the “`auth-method`” key, if the requested `auth-method` isn't supported, or the authentication challenge contains an authentication method that isn't supported.
`XC0007`	It is a dynamic error if any key in `parameters` is associated to a value which is not an instance of the XQuery 1.0 and XPath 2.0 Data Model, e.g. with a map, an array, or a function.
`XC0008`	It is a dynamic error if the stylesheet does not support a given mode.
`XC0009`	It is a dynamic error if the specified XQuery version is not available.
`XC0013`	It is a dynamic error if the pattern matches a processing instruction and the new name has a non-null namespace.
`XC0014`	It is a dynamic error if the XML namespace (`http://www.w3.org/XML/1998/namespace`) or the XMLNS namespace (`http://www.w3.org/2000/xmlns/`) is the value of either the `from` option or the `to` option.
`XC0019`	It is a dynamic error if the documents are not equal according to the specified comparison `method`, and the value of the `fail-if-not-equal` option is `true`.
`XC0023`	It is a dynamic error if the selection pattern matches a wrong type of node.
`XC0024`	It is a dynamic error if the selection pattern matches a document node and the value of the `position` is “`before`” or “`after`”.
`XC0025`	It is a dynamic error if the selection pattern matches anything other than an element or a document node and the value of the `position` option is “`first-child`” or “`last-child`”.
`XC0029`	It is a dynamic error if an XInclude error occurs during processing.
`XC0030`	It is a dynamic error if the response body cannot be interpreted as requested (e.g. `application/json` to override `application/xml` content).
`XC0036`	It is a dynamic error if the requested hash algorithm is not one that the processor understands or if the value or parameters are not appropriate for that algorithm.
`XC0037`	It is a dynamic error if the `value` provided is not a properly `x-www-form-urlencoded` value.
`XC0038`	It is a dynamic error if the specified xslt version is not available.
`XC0039`	It is a dynamic error if the source port does not contain exactly one XML document or one HTML document if XSLT 1.0 is used.
`XC0050`	It is a dynamic error if the URI scheme is not supported or the step cannot store to the specified location.
`XC0056`	It is a dynamic error if the stylesheet does not provide a given template.
`XC0058`	It is a dynamic error if the `all` and `relative` options are both `true`.
`XC0059`	It is a dynamic error if the QName value in the `attribute-name` option uses the prefix “`xmlns`” or any other prefix that resolves to the namespace name `http://www.w3.org/2000/xmlns/`.
`XC0060`	It is a dynamic error if the processor does not support the specified `version` of the UUID algorithm.
`XC0062`	It is a dynamic error if the `match` option matches a namespace node.
`XC0069`	It is a dynamic error if the `properties` map contains a key equal to the string “`content-type`”.
`XC0071`	It is a dynamic error if the `<p:cast-content-type>` step cannot perform the requested cast.
`XC0072`	It is a dynamic error if the `<c:data>` contains content is not a valid base64 string.
`XC0073`	It is a dynamic error if the `<c:data>` element does not have a `@content-type` attribute.
`XC0074`	It is a dynamic error if the `content-type` is supplied and is not the same as the `@content-type` specified on the `<c:data>` element.
`XC0076`	It is a dynamic error if the comparison `method` specified in `<p:compare>` is not supported by the implementation.
`XC0077`	It is a dynamic error if the media types of the documents supplied are incompatible with the comparison `method`.
`XC0078`	It is a dynamic error if the value associated with the “`fail-on-timeout`” is associated with `true()` and a HTTP status code `408` is encountered.
`XC0079`	It is a dynamic error if the map `parameters` contains an entry whose key is defined by the implementation and whose value is not valid for that key.
`XC0080`	It is a dynamic error if the number of documents on the `archive` does not match the expected number of archive input documents for the given `format` and `command`.
`XC0081`	It is a dynamic error if the format of the archive does not match the format as specified in the `format` option.
`XC0083`	It is a dynamic error if the `@namespace` attribute is specified, the `@name` contains a colon, and the specified namespace is not the same as the in-scope namespace binding for the specified prefix.
`XC0084`	It is a dynamic error if two or more documents appear on the `p:archive` step's `source` port that have the same base URI or if any document that appears on the `source` port has no base URI.
`XC0085`	It is a dynamic error if the format of the archive does not match the specified format, cannot be understood, determined and/or processed.
`XC0086`	It is a dynamic error for any unqualified attribute names to appear on a `<c:param-set>` element.
`XC0087`	It is a dynamic error if the `@namespace` attribute is not specified, the `@name` contains a colon, and the specified prefix is not in the in-scope namespace bindings.
`XC0089`	It is a dynamic error if the sequence type is not syntactically valid.
`XC0092`	It is a dynamic error if as a consequence of changing or removing the namespace of an attribute the attribute's name is not unique on the respective element.
`XC0093`	It is a dynamic error if a static error occurs during the static analysis of the XSLT stylesheet.
`XC0094`	It is a dynamic error if any document supplied on the source port is not an XML document, an HTML documents, or a Text document if XSLT 2.0 is used.
`XC0095`	It is a dynamic error if an error occurred during the transformation.
`XC0096`	It is a dynamic error if the transformation is terminated by XSLT message termination.
`XC0098`	It is a dynamic error if a dynamic XPath error occurred while applying sort-key to a line.
`XC0099`	It is a dynamic error if the result of applying `sort-key` to a given line results in a sequence with more than one item.
`XC0100`	It is a dynamic error if the document on port `manifest` does not conform to the given schema.
`XC0101`	It is a dynamic error if a document appearing on port `source` cannot be represented in the XDM version associated with the chosen XQuery version, e.g. when a JSON document contains a map and XDM 3.0 is used.
`XC0102`	It is a dynamic error if any key in option `parameters` is associated to a value that cannot be represented in the XDM version associated with the chosen XQuery version, e.g. with a map, an array, or a function when XDM 3.0 is used.
`XC0103`	It is a dynamic error if any error occurs during XQuery’s static analysis phase.
`XC0104`	It is a dynamic error if any error occurs during XQuery’s dynamic evaluation phase.
`XC0105`	It is a dynamic error if an XSLT 1.0 stylesheet is invoked and option `parameters` contains a value that is not an atomic value or a node.
`XC0106`	It is a dynamic error if duplicate keys are encountered and option `duplicates` has value “`reject`”.
`XC0107`	It is a dynamic error if a document of a not supported document type appears on port `source` of `p:json-merge`.
`XC0108`	It is a dynamic error if any prefix is not in-scope at the point where the occurs.
`XC0109`	It is a dynamic error if a namespace is to be removed from an attribute and the element already has an attribute with the resulting name. For instance, removing the namespace with the `ns1` prefix will raise this error when applied to `<something ns1:status="ok" status="bad"/>`.
`XC0110`	It is a dynamic error if the evaluation of the XPath expression in option `key` for a given item returns either a sequence, an array, a map, or a function.
`XC0111`	It is a dynamic error if a document of an unsupported document type appears on port `source` of `p:json-join`.
`XC0112`	It is a dynamic error if more than one document appears on the port `manifest`.
`XC0118`	It is a dynamic error if an archive manifest is invalid according to the specification.
`XC0119`	It is a dynamic error if `flatten` is neither “`unbounded`”, nor a string that may be cast to a non-negative integer.
`XC0120`	It is a dynamic error if the `relative-to` option is not present and the document on the `source` port does not have a base URI.
`XC0121`	It is a dynamic error if a document appearing on the `secondary` port has a base URI that is not both absolute and valid according to RFC 3986 .
`XC0122`	It is a dynamic error if the given method is not supported.
`XC0123`	It is a dynamic error if any key in the “`auth`” map is associated with a value that is not an instance of the required type.
`XC0124`	It is a dynamic error if any key in the “parameters” map is associated with a value that is not an instance of the required type.
`XC0125`	It is a dynamic error if the key “`accept-multipart`” as the value `false()` and a multipart response is detected.
`XC0126`	It is a dynamic error if the XPath expression in `assert` evaluates to `false`.
`XC0127`	It is a dynamic error if the `headers` map contains two keys that are the same when compared in a case-insensitive manner.
`XC0128`	It is a dynamic error if the URI’s scheme is unknown or not supported.
`XC0129`	It is a dynamic error if the requested HTTP version is not supported.
`XC0131`	It is a dynamic error if the processor cannot support the requested encoding.
`XC0132`	It is a dynamic error if the override content encoding cannot be supported.
`XC0133`	It is a dynamic error if more than one document appears on the `source` port and a `content-type` header is present and the content type specified is not a multipart content type.
`XC0146`	It is a dynamic error if the specified value for the `override-content-types` option is not an array of arrays, where the inner arrays have exactly two members of type `xs:string`.
`XC0147`	It is a dynamic error if the specified value is not a valid XPath regular expression.
`XC0150`	It is a dynamic error if evaluating the XPath expression in option `test` on a context document results in an error.
`XC0201`	It is a dynamic error if the `<p:uncompress>` step cannot perform the requested content-type cast.
`XC0202`	It is a dynamic error if the compression format cannot be understood, determined and/or processed.
`XC0203`	It is a dynamic error if the specified boundary is not valid (for example, if it begins with two hyphens “--”).
`XD0011`	It is a dynamic error if the resource referenced by the `href` option does not exist, cannot be accessed or is not a file.
`XD0023`	It is a dynamic error if a DTD validation is performed and either the document is not valid or no DTD is found.
`XD0036`	It is a dynamic error if the supplied value of a variable or option cannot be converted to the required type.
`XD0043`	It is a dynamic error if the `dtd-validate` parameter is `true` and the processor does not support DTD validation.
`XD0049`	It is a dynamic error if the text value is not a well-formed XML document
`XD0057`	It is a dynamic error if the text document does not conform to the JSON grammar, unless the parameter liberal is true and the processor chooses to accept the deviation.
`XD0058`	It is a dynamic error if the parameter duplicates is reject and the text document contains a JSON object with duplicate keys.
`XD0059`	It is a dynamic error if the parameter map contains an entry whose key is defined in the specification of `fn:parse-json` and whose value is not valid for that key, or if it contains an entry with the key fallback when the parameter `escape` with `true()` is also present.
`XD0060`	It is a dynamic error if the text document can not be converted into the XPath data model
`XD0062`	It is a dynamic error if the `@content-type` is specified and the document-properties has a “`content-type`” that is not the same.
`XD0064`	It is a dynamic error if the base URI is not both absolute and valid according to RFC 3986 .
`XD0070`	It is a dynamic error if a value is assigned to the `serialization` document property that cannot be converted into `map(xs:QName, item()*)` according to the rules in section “QName handling” of XProc 3.0 .
`XD0078`	It is a dynamic error if the loaded document cannot be represented as an HTML document in the XPath data model.
`XD0079`	It is a dynamic error if a supplied content-type is not a valid media type of the form “`type/subtype+ext`” or “`type/subtype`”.