run time error '13': type mismatch

[jarvis24]

If you make changes to the sample and then re-open it in Excel, does it appear normal? If so, try comparing the origional and revsied versions in a text editor such as the Windows Notepad. Do they look identical in form?

[joh]

You were right: Excel always added a couple of quotation marks to the file, which showed in WordPad. Now, as I manipulate the probes.csv file in WordPad, everything works fine. - Thanks!