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Tableau Prep Builder – "The underlying process stopped unexpectedly" Error on Launch

Publish Date: May 21, 2026
Description

When attempting to open Tableau Prep Builder, the application fails to launch and displays the following error:

"The underlying process stopped unexpectedly"

The error occurs immediately on launch. Reinstalling Prep Builder does not resolve the issue. Rolling back to a previous version does not resolve the issue.

Resolution
Work through the following steps in order, stopping when the issue is resolved.

Step 1 — Re-register Tableau Desktop

If Tableau Desktop is installed on the same machine:

  1. Open Tableau Desktop
  2. If prompted that the product needs to be re-registered, complete the registration process
  3. Once Desktop registration is complete, open Tableau Prep Builder — it should launch successfully

Tableau Desktop and Prep Builder share the same FlexNet licensing service. Re-registering Tableau Desktop resets the licensing state for both products.

Step 2 — Run a repair on Tableau Prep Builder

If re-registering Tableau Desktop does not resolve the issue, or if Tableau Desktop is not installed:

  1. Open Control Panel → Programs → Tableau Prep Builder
  2. Select Change → Repair
  3. Once the repair completes, relaunch Prep Builder


Step 3 — Check for AV/EDR interference

If the repair does not resolve the issue, check whether endpoint security software is blocking a Tableau DLL:

  1. Open Windows Event Viewer (Run → eventvwr.msc)
  2. Expand Windows Logs → Application
  3. Filter for Error level events and search for tabminerva
  4. Look for:
    • Faulting application: tabminerva.exe
    • Exception code: 0xc0000005 (access violation — indicates AV/EDR blocking)
    • Faulting module: tabui.dll or similar
  5. If found, ask the customer's IT team to check their AV/EDR quarantine logs (CrowdStrike, Carbon Black, Symantec, CheckPoint, etc.) for blocked Tableau files
  6. Whitelist the following directories:
    • C:\Program Files\Tableau\Tableau Prep Builder <version>\
    • C:\Program Files\Common Files\Macrovision Shared\
  7. If whitelisting alone doesn't resolve it, ask IT to temporarily disable AV in a controlled test to confirm it is the root cause, then apply a permanent exclusion


Step 4 — Full clean reinstall (last resort)

If none of the above steps resolve the issue:

  1. Fully uninstall Tableau Prep Builder
  2. Check for and delete the FlexNet folder, by default C:\Program Files\Common Files\Macrovision Shared\FlexNet Publisher if it still exists — it may be empty or corrupt
  3. Reinstall Tableau Prep Builder fresh
  4. If Tableau Desktop is also installed, run a repair on Desktop (Control Panel → Programs → Tableau Desktop → Change → Repair) — do not uninstall Desktop first, as this can wipe the shared licensing service and reproduce the problem
Knowledge Article Number

005384997

 
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