I have a python script that works just fine in Zope for SMALL input files (between 1-100 cases). However, Zope returns an error when the input file gets large (100+ cases, depending on the situation). In the error message, Zope points to a line where I take the input file and split it to create a list of lines. Note, the same script (with split) works just fine when I run the script in regular python (i.e., outside of Zope). To get around this, I would normally just read the file one line at a time, however, we don't have access to the sys module in Zope. I have loaded the input file into a File Object in Zope, and can access it via... theData = context.myFile.data The problem that I have is that when you do a split on theData, Zope returns the split error (IF myFile is large enough). The question I have is, how can I read small chunks of content from the File Object? This is akin to reading a text file one line at a time. Any hints? Ron