Hi All, I have a file which is coming from an External system in .dat form

Harsha, my personal choice would be to use an expression rule in fn!reduce() loop, instead of using a custom function. of course you have to write that specific expression rule to fetch first element, then pass the remaining string to next function in fn!reduce() loop.

Harsha, my personal choice would be to use an expression rule in fn!reduce() loop, instead of using a custom function. of course you have to write that specific expression rule to fetch first element, then pass the remaining string to next function in fn!reduce() loop.