Sorting of Nodes and Elements

Hi,,

I have an objective to print the mininmum and Maximum node & element id's of some 20 assemblies in a file.

I  have to neglect the nodes shared between other assemblies.

But the problem is when i filter the other assembly nodes in my mark the nodes count is correct. but the min & max id's are not coming correct ,

So i used the sort option like

set nodord [lsort -increasing $nodeList]

But when i saw this list some nodes are not in order. and for some assemblies it'll change in descending order..

Is there any other order to sort.

Help me on this!!!!