When you register a component with the factory, you do not enclose the class name with quotes.
You should use `uvm_component_utils(testclass_name) (note no quotes).
Also, the error message seems to indicate that you are possibly including a path with the test name? You should specify only the class name with +UVM_TESTNAME (i.e. +UVM_TESTNAME=testclass_name).
–Chuck