Unit XXX was compiled with a different version of YYY

When you try to compile your IntraWeb application from the DCUs or from the source code, you get a message similar to the one above:

[DCC Fatal Error] IWBaseForm.pas(10): F2051 Unit XXX was compiled with a different version of YYY

This error message means that you still have duplicate units in your HDD.

Please double check the steps described in Installing or Upgrading IntraWeb to fix this error.