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Workday errors in plain English.

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Workday Integration Errors, Explained

154 errors translated into plain English

Paste a Workday error and Errdex tells you what it means, how to diagnose it, how to get unblocked now, and how to stop it happening again. Covering Studio, Extend, Orchestrate, Core Connectors, SOAP, REST, EIB, RaaS and PECI.

Most-consulted errors

Studio Assembly OutOfMemoryError on Large Files

java.lang.OutOfMemoryError: Java heap space at com.workday.esb.assembly.AssemblyRunner

Workday Studio updated Jul 2026

"Invalid Request": ISU Missing Domain Permission

SOAP-ENV:Client.validationError: Invalid request

SOAP Web Services updated Jun 2026

Studio Assembly Mediation Error

com.workday.esb.mediation.MediationException: unable to mediate message at step 'splitter-1'

Workday Studio updated Jul 2026

Invalid ID Value for a Reference ID Type

SOAP-ENV:Client.validationError: Invalid ID value. 'ABC123' is not a valid ID value for type Organization_Reference_ID

SOAP Web Services updated Jul 2026

REST Custom Object: Request Body Is Array, Not Object

HTTP 400 Bad Request VALIDATION_ERROR: Expected a JSON object but received a JSON array

REST API updated Jun 2026

Studio workday-out-rest: Custom Object Endpoint Path Not Resolving

HTTP 404 Not Found. The requested resource could not be found.

Workday Studio updated Jul 2026

REST API 401: invalid_token / Expired Access Token

HTTP 401 Unauthorized {"error":"invalid_token","error_description":"The access token is invalid or has expired"}

REST API updated Jul 2026

Validation Error: Required Element Missing in Request

SOAP-ENV:Client.validationError: Validation error occurred. Required element 'Position_ID' is missing from the request

SOAP Web Services updated Jun 2026

Studio Splitter XPath Fails: Could Not Find Mapping for Prefix

com.capeclear.mediation.MediationException: Error while parsing XPath expression'/ws:Worker_Sync/ws:Worker', namespace mappings='{cc=http://www.capeclear.com/assembly/10, cloud=urn:com.workday.esb.clo

Workday Studio updated Aug 2026

REST Custom Object 404 "not found: id" Is Often a JSON Syntax Error, Not a Missing Record

Reason: Not Found. Status=404 content={"error":"not found: id"}

REST API updated Aug 2026