You can use the TextFile reader (read whole file at once = Yes) followed by a PythonCaller:

import fme
import fmeobjects

class FeatureProcessor(object):
    def __init__(self):
        self.split_at = 256
        
    def input(self,feature):
        text = feature.getAttribute('text_line_data')
        if text:
            chunks = etextai:i+self.split_at] for i in range(0, len(text), self.split_at)]
            for chunk in chunks:
                f = fmeobjects.FMEFeature()
                f.setAttribute('chunk', chunk)
                self.pyoutput(f)

This will output one feature with the attribute "chunk" for each chunk of 256 characters inside the attribute "text_line_data".

@david_r, thank you for your quick response. I'm a newby and not familiar with Python. I have made a workbench and i can see in the inspector a chunk(string) with indeed data of 256 char. The workbench produced 155924 rows so it looks ok. How can I grap these chunks and place them in a separate attribute? or place them in an ORA-file. I have tried with substr, testfilter and attributecreator but that does not work. Can you help me?

Can you describe in more detail what you need to do with each chunk? Do you have to split it up further?

@david_r,

You can use the SubstringExtractor to extract the first two positions, then a Tester or TestFilter to split the records accordingly.

Finally, create an Oracle writer and import the appropriate table definition and send your features to it.

@david_r, It works! I forgot to expose the attribute 'chunk' in the PythonCaller-parameters. Thank you very much for your time and solution.