>>>>Thanks, but I don't think so. :) It's got to be positional. That would overwrite every occurance of that value throughout the string, no?
>>>>
>>>>Given a string with a specified delimiter
>>>>
>>>>ISA*00*00*ZZ*TEST^
>>>>
>>>>remove the ZZ and replace it with MY. It's in the 4th "field" position.
>>>>
>>>>Thanks!
>>>
>>>Hi Mike,
>>>
>>>Most well-formed EDI documents are (or can be) one long string, so I'm not sure what you are asking for is doable.
>>>
>>>If you break up the transactions into segments it might be possible, but I don't think there is a 'generic' solution. I would guess that you typically need to know what Loop/Segment you are dealing with.
>>
>>Yes, each segment would be treated as a "record". The ISA line has preset field "positions".
>>
>
>When dealing with elements by position, I typically call ALINSE() to break up the document into segments, then ALINES() again on segments of interest (and ALINES() again if a need a sub-element).

I've found I get the best performance by pulling a text file into a cursor and processing it with scan/replace.

I'd have to use alines to grab the elements, replace one element and undo the alines back to the string before writing it back to the field.