A Workday Studio integration fails, and the notification says little more than "completed with errors." The assembly ran, something broke partway through, and now you need to find out what happened — ideally without re-running the whole thing against production data while you guess.
Studio provides real debugging tools, but they are not always obvious. This guide walks through a repeatable process: start from the run report, narrow down to the failing step, reproduce the failure locally, and use Studio's built-in breakpoints and message inspection to find the root cause.
Step 1: Read the Integration Events Report
Every Studio integration run generates an Integration Events record in Workday. Navigate to the integration system, open Related Actions > Integration > View Integration Events, and find the failed run.
The Integration Events report is organized step by step — each mediation, transport, and transformation component that executed shows its status, timing, and any messages. Look for:
- The first step marked as failed or warning. Errors often cascade, so the earliest failure is usually the root cause.
- Step timing anomalies. A step that ran for several minutes when it normally completes in seconds often indicates a payload-size or memory issue.
- The error message text. Copy it exactly — you will need it when searching Workday Community or comparing it to known patterns.
This report is your starting point, not your answer. It tells you where the integration broke but rarely why.
Step 2: Reproduce Locally in Studio
Open the integration project in Studio and set up a local run against a sandbox tenant. If the failure depends on specific data, use the same launch parameters or input file that triggered the production failure.
Running locally matters because Studio's debugging tools — breakpoints, message inspection, expression evaluation — only work during a local run. You cannot attach a debugger to a cloud-side execution.
If the integration is event-triggered (launched by a business process), you can trigger the same event in the sandbox tenant. If it is scheduled, use Run Now from Cloud Explorer. The goal is an environment where you can reproduce the failure and pause execution at any step.
Step 3: Set Breakpoints on the Suspect Steps
Studio supports assembly-level breakpoints. Right-click on any mediation step, transformation, or routing component and select Toggle Assembly Breakpoint. A green box appears on the step to confirm the breakpoint is active.
When you run the integration in debug mode, execution pauses at each breakpoint. Use F6 (or the step-over button in the toolbar) to advance one component at a time.
Start by placing breakpoints before the step that the Integration Events report identified as failing. This lets you inspect the message as it enters the failing step, which is often more informative than the error message itself.
Step 4: Inspect the Message at Each Step
When paused at a breakpoint, open the Assembly Debug view. The Message root part tab shows the full XML message as it exists at the current step — including any transformations applied by prior steps.
This is where most debugging breakthroughs happen. Common findings:
- Missing or empty elements in the XML that downstream XSLT expects to be populated.
- Namespace mismatches — a transformation produces output in one namespace, but the next step's XSLT matches against a different one. This is especially common after Workday platform releases change the default XML schema.
- Unexpected data formats — dates, numbers, or identifiers that don't match what the next step's logic assumes.
Compare the actual message content against what your XSLT or MVEL expressions expect. The mismatch is usually visible.
Step 5: Evaluate Expressions in the Scratchpad
Studio's Scratchpad panel lets you write MVEL or XPath expressions and evaluate them against the live message at the current breakpoint. This is faster than adding Log steps and re-running.
Use it to:
- Test XPath selectors to confirm they match the elements you expect.
- Evaluate MVEL expressions from your Eval steps to check for null values or type mismatches.
- Prototype fixes — try a modified expression in the Scratchpad before changing the assembly.
The Scratchpad only works during a paused debug session. Outside of debugging, you will not see the evaluate option.
Common Error Patterns
Certain failures come up repeatedly across Studio integrations:
XSLT transformation errors. The most frequent cause is a namespace change after a Workday release. A template that matched wd:Worker stops matching when the platform updates its namespace URI. Fix: update the namespace declarations in your XSLT to match the current Workday schema.
Memory and payload failures. Workday loads messages as DOM objects. Transformations on documents larger than 100 MB can consume ten times the source size in memory. With a hard limit of 1.5 GB per integration and a 2-hour processing cap, large payloads require XSLT 3.0 streaming or pre-splitting with a Splitter step before transformation. A single file cannot exceed 250 MB, and total generated output is capped at 1 GB.
Authentication failures. Expired X.509 certificates and OAuth token-refresh failures cause integrations to fail at the transport step. These often appear suddenly when a certificate reaches its expiration date. Check the integration system's authentication settings and the certificate expiration in Workday's security configuration.
Deployment conflicts. Collection version conflicts or CLAR packaging mismatches cause deployment failures rather than runtime failures. If the integration deployed successfully before and now fails to deploy, check whether another developer deployed a different version of the same collection.
When Log Steps Are Enough
Not every problem requires breakpoints. For integrations running in production where you cannot reproduce the failure locally, adding temporary Log steps to the assembly is a pragmatic fallback. Place Log steps before and after the suspect component, redeploy, and re-run. The log output appears in the Integration Events detail.
Log steps are also useful for intermittent failures that depend on specific data values — you can log the message content and review it after the run completes.
The tradeoff: log-based debugging requires a deploy-run-read cycle for each hypothesis. For complex issues, Studio's interactive debugger is significantly faster.
Accelerating the Process
The debugging cycle — reproduce, set breakpoints, inspect, hypothesize, fix, re-run — is where most integration development time goes. Each iteration requires manual navigation through Studio's Eclipse-based UI, and stepping through a long assembly one component at a time is slow.
kiweely's Studio plugin can compress this cycle. When connected to your Studio instance, kiweely's assistant reads the Integration Events report, sets breakpoints, inspects messages, and evaluates expressions through chat — the same debugging tools described above, driven conversationally. It can also propose and apply fixes to XSLT or MVEL expressions, then re-run the integration to verify. The debugging process stays the same; the manual overhead decreases.
Whether you debug manually or with tooling, the method is consistent: start from the run report, narrow to the step, inspect the message, find the mismatch, fix it, and verify.