Thanks BobB and JRB for replying,
NT- suport tool version 4.8E used to work on my windows 7 pro machine. This week i needed it to read the tags used in the HMI. the tool did start, it shows in taskmanager, services that NTST.exe is running. But no window will pop up. I did a reinstall from the CX-One dvd, but the same thing happend, no window.
I need to read the tags used in the HMI, because the plc CQM1 died. Fatal memory error. i got a backup from the program but not the symbol list, so i need to do some reverse engineering so i can replace the PLC and HMI for some new hardware.