I created a new IOK file and pasted "2009052500" into a blank field. I then tried to convert it to dates, using the pattern "yyyyMMddHH" and this worked. Perhaps there are some invalid dates in your data. When you try to convert and you get errors, copy the erroneous dates back here.
I could do that, too...copy and paste into a new IOK file...and that worked for me, but I have 275k rows of data that I need to manage. I shouldn't have to copy and paste from one file to another.
Ok, I found the problem/solution.
Omniscope had enabled the "Show thousand separator", which I unticked...and that rendered the data readable by the Date/Time converter.
James Sandoval SVP & Managing Director, EMEA BrightTag