Extension status issue - exception occurred ExtStatus

[jmani]

Hi,

We are using version 9. Our receptionists are facing some issues after they transferring the call. Sometime they can't receive any calls after they transfer the call to other extension. When I check their extension status, it is saying "dialling". When I try to select and disconnect the call I am getting the follwing error occurred.

"An exception occurred ExtStatus Error:"

Please advice how to fix this issue.

Thanks,