Error "Hyper Api: Could Not Connect to the Hyper Server. " When Connecting to Excel File

Published: 16 Mar 2020
Last Modified Date: 08 Jul 2022


The following error may occur when connect to excel file.

error code :37CE01A3 

Hyper API: Could not connect to the Hyper server. Could not connect to the Hyper server.: All pipe instances are busy. (0x000000E7/231) Is the server running locally and accepting connections on named pipe "//./pipe/{1380F684-F67F-4038-8E29-27D2BDC9C7F4}"?  



  • Tableau Desktop
  • Excel


1. Check if the following path exists and will hyper file like "#TableauTemp_XXX" be created successfully or not when connect to excel file.
"C:\Users\<username>\AppData\Local\Temp\TableauTemp" .

2. If TableauTemp folder does not exist, confirm if you have permission to access it or not or does temp folder has a volume limit or not.

3. Work with your IT team to exclude these paths from monitoring list of all anti-virus software installed in your environment.
C:\Program Files\Tableau\Tableau <version>\bin\hyper\hyperd.exe
C:\Program Files\Tableau\Tableau <version>\bin\tableau.exe


Access to hyper.exe is blocked by anti-virus software and cannot access Temp folder, "C:\Users\<username>\AppData\Local\Temp\TableauTemp"
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