Any ideas how to get around this .... john --------------------Configuration: ITKBasicFiltersTcl - Win32 Release-------------------- Performing Custom Build Step on P:\WinCVS\Insight+\Insight\Wrapping\Tcl\BasicFilters\wrap_itkTernaryMagnitudeImageFilter.cxx The input line is too long. Error executing c:\winnt\system32\cmd.exe.