Since going from version 2 to 3 of MirrorSync last year we have constantly had MirrorSync crashing the Web Publishing Engine. 

Sometimes it says "Error from server: FileMaker XML WPE Web Publishing Engine is not running at <the hosted IP>. Ensure that the WPE is working correctly, and then try this operation again."

But usually it is an Error 10 error. "Error 10 while connecting to http://<the hosted IP>/sync?ping=1&config..."

Early on we made the documented suggested changes for this error, to the connectionTimeout Property in the IIS Manager application. With no noticeable effect.

Most of the time MirrorSync works as expected and does a great job and then clients can't sync and all hell breaks loose.

Do you have any other suggestions for what might be causing this issue?

We blew this machine away and deployed a new server. We are not having these issues.

Edited June 21, 20178 yr by amallison

I have had this a couple of times when the server has run out of disk space. So it maybe that the new server provided you with more space, which is why the issues disappeared.