From what I have learned, there is no direct replacement for the Total Data Size property for use with running VIs. There are two semi-replacements, but neither one has the complete functionality of the former property node.
First, you can gather system information from the command prompt. However, all LabVIEW information is listed under one item. This <a href=" http://www.yqcomputer.com/
" target="_blank">article</a> explains more.
Second, you can use the memory profiler tool in LabVIEW. Tools Profile Performance and Memory
Note that you can also continue to use your LabVIEW 6.1 executable that functions as you want.
I hope this helps,Kevin S.Applications EngineerNational Instruments