SOAPUI 4.5

Hi every on
Here is my goal:
I have already a test case
But I want to add a new feature.
1) I want to read datas from a CSV file. The
2) loop over each lines of the CSV file
3) Set my tests case properties from datas
4) execute my test case

I start to write the groovy script but when I run my test case soapui freeze

log.info("Start script")
def tc = testRunner.testCase
def file = new File('/tmp','test.csv')
def lines = file.readLines()
def i = 0

for(i = 1; i < lines.size; i++) {
 def datas = lines[i].split(";")
 
 def j = 0
 for(j = 0; j < datas.length; j++) {
  tc.setPropertyValue( "Prop1",datas[0] )
  tc.setPropertyValue( "Prop2",datas[1] )
  tc.setPropertyValue( "Prop2",datas[2] )
  tc.setPropertyValue( "Prop4",datas[3] )
  tc.setPropertyValue( "Prop5",datas[4] )
  tc.setPropertyValue( "Prop6",datas[5] )
 

 }
 
}
log.info("End of script")

I added logs and I saw that the csv file has been read and I can see datas extracted from the file
my script works well except if I add the following line:

tc.run(new com.eviware.soapui.support.types.StringToObjectMap(), false)

My script then becomes

def tc = testRunner.testCase
def file = new File('/tmp','test.csv')
def lines = file.readLines()
def i = 0

for(i = 1; i < lines.size; i++) {
 def datas = lines[i].split(";")
 
 def j = 0
 for(j = 0; j < datas.length; j++) {
  tc.setPropertyValue( "Prop1",datas[0] )
  tc.setPropertyValue( "Prop2",datas[1] )
  tc.setPropertyValue( "Prop2",datas[2] )
  tc.setPropertyValue( "Prop4",datas[3] )
  tc.setPropertyValue( "Prop5",datas[4] )
  tc.setPropertyValue( "Prop6",datas[5] )
 }
tc.run(new com.eviware.soapui.support.types.StringToObjectMap(), false)
}

and then soapui freeze

Did anyone had this problem ?
best regards