Error for getitem and insertitem

I have created the mulit-column list control to show and treat data. When I run the program, the error ' The instruction at "0x10219a5c" referenced memory at "0x2fdf070a". The memory could not be "written".' was prompted. I have debugged the program and discover this error created by getitem and insertitem of CListCtrl.

What is the meaning of this error?
How to fix it?
Thank.
edward95Asked:
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md041797Commented:
Grade your provious responses and maybe someone will help you
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md041797Commented:
Thanks for grading your responses.  Refuse these answers to re-queue them.  Sorry I was so loud.
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mzbd9wCommented:
One possibility:  We recently started experiencing this problem because we were not setting the mask on the data item before calling GetItem.  I haven't been able to find documentation indicating a need to set the mask; however, that does appear to be our problem.  The weird thing is, it worked when originally implemented.  We didn't have a problem until we started upgrading our OS Service Packs.  Sample code to set mask follows:
LV_ITEM lvi;
lvi.mask = LVIF_IMAGE | LVIF_STATE;
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