Hi all Ok, my tool is comming along nicely, but here is where I am stuck at. I currently am opening a file and reading the contents. Then I open a second file, where I put my modification to the first file. Then this file is fed to the destination tool. I think this is a BIT redundant and stupid but I don't know how else to inline edit it. My thoughts are something along this open File read in line by line, making my changes as neccessary into a buffer? Start my tool and pump my buffer into it? (Memory Hog) Or Open file Start tool Read line by line, edit as neccessary Feed line by line my data into the tool Can anyone enlightenmen me on how to best do this?? Thanks so much -- Steven M. Klass Physical Design Manager National Semiconductor Corp 7400 W. Detroit Street Suite 170 Chandler AZ 85226 Ph:480-753-2503 Fax:480-705-6407 steven.klass@nsc.com http://www.nsc.comThread Next