ERROR ABOUT COVERAGE WITH QUESTASIM

HI,
I have just code coverage for my design with questasim 10.0b on Cygwin enviroment. But not complete. Can you help me resolve this error

And my code for coverage following:

rm -rf work
rm -rf *.ini *.log
rm -rf ./log/* ./wave/* ./ucdb/* ./coverage/*
rm -rf transcript

export TEST_LIST=test_list

while read TEST_NAME
do
    echo
    echo
    echo
    echo "--------------------------------------------"
    echo "  Test name = $TEST_NAME";
    echo "--------------------------------------------"
    echo
    cp -rf ../testcase/$TEST_NAME.vt ./run_test.vt

	rm -rf work
	vlib work
	vmap work work
	vlog  -f compile.f

	
  
	export TEST_NAME=$1
	if [ -n "$2" ]
	then
		export SEED=$2
	else 
		export SEED=1
	fi

vsim -f simulate.f


done < $TEST_LIST


vcover merge ./ucdb/all_test.ucdb ./ucdb/*.ucdb
vcover report -html -htmldir ./coverage -verbose -threshL 50 -threshH 90 ./ucdb/all_test.ucdb


rm -rf work
rm -rf *.log *.ini transcript

Would need to see the error message. In any case, this is a tool specific question and you would be better off contacting Mentor support directly.