I cannot use polymorphic VIs as I do not know at the design time all possible data types during run time. Besides, use of polymorphic VIs is cumbersome. However, I know answer for the first question already.
The second question deals with inability of LabView (to my knowledge)to provide a way to explicitly access the data type of data in variant during runtime. I did not find a simple way to compare two varians (for example, I would like two variants of same data types but having different data values give TRUE, i.e. equal, on comparison). Hope it clarified the original question a bit. Thank you for the help, Michael
