Error "Specified driver could not be loaded due to system error 126..." When Opening a Workbook Connected to Teradata Aster

Published: 01 Nov 2017
Last Modified Date: 18 May 2018


When opening a workbook connected to Teradata Aster, the following error might occur: 

"Specified driver could not be loaded due to system error 126: The specified module could not be found. (Aster ODBC Driver, CProgram Files\Teradata Aster\Aster ODBC Driver (x64)\ASTERDATAODBCDSII.DLL" 
Additionally, when viewing the Tableau Desktop log file, the following error can be found: 

throw DataSourceException (type=NoDriver):
Tableau requires a 32-bit driver to connect to the database server '', but the 64-bit driver is installed.



  • Tableau Desktop 
  • Windows 
  • Teradata Aster


Uninstall Aster Client Tools for Windows 64-bit and install Aster Client Tools for Windows 32-bit.



There is an inconsistency between the database driver versions (64-32 bits.)
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