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Home > Success Center > Network Configuration Manager (NCM) > Unable to compare configuration files most likely caused by broken regular expressions

Unable to compare configuration files most likely caused by broken regular expressions

Updated August 23, 2017

Overview

This article describes issues related to the following error:
Unable to compare configuration files, most likely caused by broken regular expressions. Inspect your logs for details.

 

Environment

  • NCM 7.6

 

Cause 

 

The configuration differences engine doesn’t accept some regular expression characters or tokens.

Resolution

  1. Click Settings > All Settings.
  2. Under Product Specific Settings, click NCM Settings. 
  3. Under Configs, click Comparison Criteria.
  4. Replace all ‘\s’ occurrences to ‘[ \t\r\n\v\f]’ in the RegEx column.
    Example: ‘\s*crypto.*certificate’ -> ‘[ \t\r\n\v\f]*crypto.*certificate’
  5. Replace all ‘error’ occurrences to ‘er[r]or’ in the RegEx column.
    Example: ‘errors*’ -> ‘er[r]ors*’
 

 

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