Why do I encounter failures on Test 5 of the XPCTEST function in xPC Target?

Why do I encounter failures on Test 5 of the XPCTEST function in xPC Target? Here are the errors I am encountering:

 >> xpctest

 ### xPC Target Test Suite 1.3

 ### Host-Target interface is: TCP/IP (Ethernet)

 ### Test 1, Ping target system using standard ping: ... OK

 ### Test 2, Ping target system using xpctargetping: ... OK

 ### Test 3, Reboot target using direct call: .................. OK

 ### Test 4, Build and download xPC Target application using model xpcosc:

 ... OK

 ### Test 5, Check host-target communication for commands: ... FAILED

The target PC monitor displays the message that it cannot locate model.dll. I am using the Watcom C/C++ compiler 11.0c update.

Answer 1

[MathWorks Support Team]

Several of our customers have encountered difficulties with the Watcom C/C++ compiler 11.0c update. If the Watcom C/C++ compiler 11.0 is used WITHOUT the installation of the 11.0c patch, you will not encounter these difficulties.

Our development staff is currently investigating this issue. The only known possible workaround is to uninstall the Watcom C/C++ Compiler 11.0, then reinstall it without the 11.0c patch.