SAP Message BCOMEC037 - The call on hold cannot be retrieved for the purpose of reconnection

Diagnosis
In order to be able to execute the requested action, the call on holdmust be retrieved. In the process, an error occurred.
Further information on the external software component:
V3
The server concerned is &V1&.

System Response
The call on hold was not retrieved. Therefore, the follow-up action isnot possible either.

Procedure for System Administration
The error can occur in 2 different places:
1. In the connected gateway
2. In the underlying CTI software
In this case the error occurred in (&V4&).
The return code for the underlying CTI software is: &V2&