EL
ErrorLib
Brands
||
  1. Home
  2. Fanuc
  3. R-30iA R-30iB Controller
  4. XML_TAGNEST
About·Privacy·Terms

ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

XML_TAGNEST

Tag nesting level too deep

Fanuc · R-30iA R-30iB Controller

What does XML_TAGNEST mean?

This fault occurs when the hierarchical nesting of XML tags in the file exceeds the maximum allowed depth for the parser. Deeply nested XML structures can consume excessive resources or violate internal processing limits, leading to parsing failure.

Common Causes

  • The XML file has a deeply nested structure where the hierarchy of tags exceeds the parser's limit.
  • Recursive or excessively complex XML design.
  • A malformed XML file creating an unintended deep nesting.
  • Software limitation on the maximum depth of XML tag nesting.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reduce the nesting depth of XML tags in the configuration file.

  2. 2

    Flatten the XML structure by refactoring element relationships.

  3. 3

    Ensure that tag nesting is logical and not unnecessarily deep.

  4. 4

    Review the XML file for any unintended recursive tag structures.

  5. 5

    Check parser documentation for the specific maximum tag nesting depth.

Browse all codes in this manual (31)
Verified technical data. Last updated: April 2026

Related Faults

12328File is not opened12329Cannot write the variable12330Write file failed
Source: Fanuc R-30iA R-30iB Controller
Open Manual (Page 202)Search more codes in this manual