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Home > Success Center > Network Performance Monitor (NPM) > NPM - Knowledgebase Articles > After upgrading to NPM 11.5, resources on WPM 2.1 fail with "Specified Cast is Not Valid"

After upgrading to NPM 11.5, resources on WPM 2.1 fail with "Specified Cast is Not Valid"

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Created by Interspire Import, last modified by MindTouch on Jun 23, 2016

Views: 1,155 Votes: 1 Revisions: 8

Issue

After upgrading to NPM 11.5, several WPM 2.1 resources (Steps Availability, Transaction Availability, Player Load Percentage) display the following error message:
   There was an error while loading data for this resource. 
   Specified cast is not valid.

Resolution

Apply Hotfix 2 for WPM 2.1
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