Thanks for that.
But what difference it really makes.
I think in the sort fields we can give a maximum upto 64 sort fields based on which we can sort.
So what really is the constraint on giving more conditions.
Priyesh has it right. You need to comply with DFSORT's syntax rules. It's hard to tell which columns your SORT statement are in, but it appears that you ran over column 71 which is the last column you can use.
You should have looked up message ICE003A - the doc tells you what's wrong: