Latest MonoTouch 4.0 problem when trying to access a WCF service

Question

My MonoTouch application is calling to a SOAP WCF Service using CustomBinding with HttpTransportBinding and TextMessageEncodingBinding

Answer 1

Your question lacks many details to help us help you, but here's two things you should try:

1) Some fixes made for WCF inside MonoTouch 3.x were (sadly) missing from MonoTouch 4.x. It's possible that your application depended on them. If you use MonoTouch 4.1 then you can replace your System.ServiceModel.dll (see comment #6 of the above link), rebuild your application and see if this fix solves your issue.

2) Several fixes were made in the HTTP stack for MonoTouch 4.2 (soon to be released, but most are not in the 4.1 beta). They are not exactly WCF-related but it's not clear if your 400 error message is a WCF failure (or not).

If both updates do not solve your issue then please fill a bug report at http://bugzilla.xamarin.com and attach a self-contained test case so we can investigate this further. Thanks!