Access violation at address 1A14DA6C in module 'eware.dll' error, when trying to connect a Web Reference from Visual Studio.

I’m trying to connect to the eware.dll to access webservices/webservice.wsdl, but get the following error when I try to connect to this as a Web Reference from within my, c#, solution:

There was an error downloading 'https://{machineAddress}/crm/eware.dll/webservices/webservice.wsdl'

Access violation at address 1A14DA6C in module 'eware.dll'

We have an old third-party Web App that is acting as an intermediary application and is currently connecting to the eware.dll/webservices/webservice.wsdl web Service for this one particular CRM site, but we want to be able to talk to the webservice.wsdl directly, as we can on other CRM systems.

Is there any way that the wsdl may be somehow 'tied' to this old third party system from within CRM? And if so, how could we see this and open it up so a ‘normal’ direct connection could be made?