Vozone tests in dogfood are failed (http://build.xored.com/browse/Q7-Q7D12-DGFD-745):
On the local machine these tests are failed too with the same error:
Cause: 'The control "Change Instance Type" is disabled.'
1. Select object on diagram
2. Select "Change Instance Type" control from context menu
At the replaying Q7 test this control is disabled, but selection of object is correct.
If rewrite these actions the test is failed too.