The 'Bulldozer-923 Binary Build: Engine and Tools has stopped working' and 'Game data not found. Are you missing command line parameters?' errors have been reported to affect some players owning the Warhammer End Times: Ultimate Edition bundle, usually while attempting to play with the game freshly installed. This can be solved by the solution listed below:
Disable and Re-Enable All DLC
- Right-click Warhammer End Times - Vermintide in your Steam library sidebar
- Select 'Properties'
- Select the 'DLC' tab
- Disable all DLC content checkboxes
- Close and reopen Steam
- Launch Warhammer End Times - Vermintide
Warhammer End Times - Vermintide should now run without displaying an error.
- Close Warhammer End Times - Vermintide
- Right-click Warhammer End Times - Vermintide in your Steam library sidebar
- Select 'Properties'
- Select the 'DLC' tab
- Enable all DLC content checkboxes
- Close and reopen Steam
- Launch Warhammer - Vermintide End Times
Warhammer End Times - Vermintide should now run with DLC, without displaying an error.