[/quote] Where are the X's occurring?  If they occur on mostly white and very bright colors, your scanner may be overexposing.  If they occur on saturated colors like bright magenta, bright green, etc. your scanner my be oversaturating.  What scanner are you using and what software to acquire?

Mike
[/quote]

Thank you both for a quick response. The X's are occurring mostly on the 1st line, more on the left hand side ie patch 0 onwards.
The scanner is Canon  MP970 (AIO). The software is Vuescan with settings as recommended.

I did make a print using the profile obtained. It's OK but lacks a bit of details.

Hi, I have had good successes with profiling Kirkland glossy and Ilford premium pearl papers. For both of these, I only had a couple "X"s. However, with Staples Supreme Matte Double sided paper I get as much as 32 red "X"s. Is there a way to improve on this?

I use the scanner from canon MP970 and Vuescan. The ink is from Hobbicolors. I have done this a couple of times.