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 document structure contains an excessive number of nested tags, exceeding the parser's configured limit.

Repair Steps

Browse all codes in this manual (31)
Verified technical data. Last updated: March 2026
Source: Fanuc R-30iA R-30iB Controller
Fanuc Error XML_TAGNEST: Tag nesting level too deep — Troubleshooting Guide | ErrorLib