There is a known issue within Silk Performer 15.5 and Silk Performer 15.0 when using the 'Evaluate Agent VUser Capacity' dialog within the Silk Performer workbench - SILK PERFORMER | ASSIGN AGENTS. Expected behaviour is when a User Type and Agent has been selected, the 'Start' option is enabled and Silk Performer will gradually increase the number of virtual users. The run is automatically stopped if at least one of various conditions are met, including CPU usage exceeding 95%. The behaviour at present is sporadic, at times when a User Type and Agent have been selected the Start option is enabled, whilst at other times, the option is disabled. Development have recognised this as a bug and the issue will be officially addressed within a future Silk Performer release.
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