Use the intrinsic varfile to bring values you have saved to a file back into Prism. Its syntax is:
varfile("filename")
where filename is the name of the file that contains the values you want to restore.
The varfile intrinsic is not available in MP Prism.
You can use the varfile intrinsic anywhere you could have used the original variable or expression that you saved to a file. For example, if you saved x:
varsave "x.var" x
then the command
print varfile("x.var")
is equivalent to
print x
Note that this allows you to save a variable's values, then print them during a later Prism session, without having a program loaded or running.