http://bugs.winehq.org/show_bug.cgi?id=25049
--- Comment #6 from Nikolay Sivov bunglehead@gmail.com 2010-11-07 04:19:49 CST --- (In reply to comment #4)
msxml3 and msxml4 are already installed. If msxml4 component doesn't exist in the system, mathcad doesn't even install and start.
Wine has its own msxml4, what I'm talking about is native msxml4. If you see any msxml traces in log then native module is not used.
1) If Mathcad installer detects that msxml4 is missing with fresh .wine and recent version like 1.3.6 then a version detection doesn't work for some reason, most likely because of another Wine bug; For that problem open a new report for installer itself as affected application;
2) Attached log shows schemas problem running wine builtin msxml, this is what's this bug about. Install Matchcad with all necessary modules like mdac or native msxml4. Then set msxml4/msxml3/msxml6 to builtin only in winecfg and get a +msxml,+tid log starting matchad (http://wiki.winehq.org/FAQ#get_log), attach it as a text file.