In Blueworx Voice Response VRBE log, the following error is logged:

com.ibm.telephony.directtalk.mrcp.MRCPReco.fetchWaveform() error fetching waveform: com.ibm.telephony.directtalk.mrcp.MRCPException: Waveform fetcher: Socket I/O problem: java.net.ConnectException: A remote host refused an attempted connect operation.

By default, Nuance speech server uses port 90 for the URL of the recorded utterance. This setup does not match the default setting of most HTTP servers. The customer should check the Nuance speech server Installation and User's Guide for the "Waveform-logging resources" to ensure the matching TCP port setup.