Quote Originally Posted by Kapil
Hi,

This error is because it is not able to find the nmake.exe...

As your new installation has been set to QT4, there is no nmake.exe present.. its make.exe for QT4...
set the paths properly for the new installation...
The two installations should not create any problems... they are independent of each other...
just set the QTDIR path to the one from which you want to execute..
If you want to execute using nmake.exe then set the path of QTDIR to Qt3.3
else to QT4...

Try to set the enviornment variables...
Not true, you can use nmake for both (the make tool has nothing to do with Qt BTW, it is provided by Microsoft or Borland, or whoever). The problem is probably that you are using the Qt4 qmake to build a Qt3 project. make sure that the Qt3 qmake appears first in your %PATH% environment variable.