Problems with "multiple target patterns"

[Leif Warland]

I have the following lines in my Makefile:

DSU = DSUSR.MAP DSUSR.exp DSUSR.lib DSUSR.DLL

$(DSU): $(DYRFIL) $(OBJS) $(CONECOBJ)  
        echo $(OBJS) > dsusr.files
        echo $(CONECOBJ) >> dsusr.files
        echo "$(PSSEPATH)\PSSE.LIB" >> dsusr.files
        echo "$(PSSEPATH)\MSUTIL19.LIB"  >> dsusr.files
        echo "$(PSSEPATH)\DSMDL.LIB" >> dsusr.files
        parse32 dummy.bat $(OBJS) 
        rm dummy.bat
        link $(LIPAR) @dsusr.files /out:"DSUSR.DLL" /map:"DSUSR.MAP"
        rm  dsusr.files

The funny thing is that it works on my machine running cygwin,  but
not on my colleague's. There it complains that there are "multiple
target patterns".  What is wrong?
-- 
Leif Warland