Classification/Structured Keyword Volume LimitsClassification/Structured Keyword Volume Limits

What 

Limitations to structured classifications and taxonomies in Pure.

How

From 5.29.0 on, the number of Classifications within a Classification Scheme is set to a limit of 500.  This means a classification scheme can have less than or equal to 500 values in the classification scheme. If you try exceed this limit you will get a warning regarding the allowed range (0-500).

Please also refer to the 5.29 release notes for more information on this- Update to classification schema count of maximum values.

Prior to 5.29.0 there was not a 500-limit so if you have a classification scheme that exceeds 500 values, then we only allow modifications which do not increase the number of values. 

More information

KB-614 Only allow selection of classification leaf nodes on keyword group
KB-250 How to import a controlled vocabulary