Undefined Method getDefaultMountBy Editing Boot Loader Section in AutoYaST File

This document (7018441) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 12 Service Pack 1 (SLES 12 SP1)
SUSE Linux Enterprise Server 12


When attempting to edit the boot loader section of an autoyast control file that was opened in the Autoinstallation Yast Module, the following error is observed:

Error: Internal error. Please report a bug report with logs.
Details: undefined method 'getDefaultMountBy' for nil:NilClass.
Caller: /usr/share/YaST2/modules/Storage.rb:6921:in 'GetDefaultMountBy'

A similar error appears in /var/log/YaST2/y2log.

To duplicate run
1. yast2 > Miscellaneous > Autoinstallation
2. Select File > Open > Select your autoyast control file > OK
3. Select Modules > Boot Loader > Edit

The error is observed most of the time. Occasionally no error is observed.

The problem does not happen on SLES12 SP2.


The issue has been reported to engineering. The current resolution is to upgrade to SLES12 SP2 or higher.


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7018441
  • Creation Date: 04-Jan-2017
  • Modified Date:03-Mar-2020
    • SUSE Linux Enterprise Server

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