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>I have XMLTOCursor() used in one of my programs and it works fine on most PCs. One user gets an error saying OLE error code 0x800401f3: Invalid class string at this command. Do you know which windows/VFP component needs to be available to that user for this to work correctly?

The XMLTOCURSOR() function internaly uses MSXML 3.0. Make sure that you install MSXML 3.0 with your application or separatly http://www.microsoft.com/downloads/details.aspx?familyid=c0f86022-2d4c-4162-8fb8-66bfc12f32b0&languageid=f49e8428-7071-4979-8a67-3cffcb0c2524&displaylang=en