If you were to take the time and read the document ion, your answer would already have been found. Highlight the call_close statement in the WinRunner editor and press the F1 key to open the TSL help file to the function.
And then read the information provided to you for the function.
Right there in the middle is the following statement:
[ QUOTE ]
Note that if the called test is already open when the main test is run, call_close will not close the called test.
[/ QUOTE ]
No more than 2 seconds. Now that someone has done the work for you, please remember that in the future there is a lot of information at your fingertips to go and research simple issues like this. As well, since you are in QA, it should have been a simple tests to find out the conditions of how call_close works.
Insanity: doing the same thing over and over again and expecting different results