Debugging Flat file connection manager when preview works but run-time doesn't

Hi,

I am trying to process a non-standard flat file. Initially I want to just convert 1 line of text into a single column.

I have selected ragged right with a HeaderRowDelimiter of {CR}

The column width is 500 - which is plenty wide enough to hold any line.

When this is all setup and I check the preview it looks fine.

I noticed when running the code through that I wasn't getting the expected behaviour so I put a DataViewer on the connection out of my Flat File Data Source. At run-time this shows that all the rows come out containing no text.

Could anyone offer a suggestion what could be wrong or what other steps I can take to debug this.

Thanks.