If version/property changes are specified, the Make Delphi action first updates the project .res file (using brcc32.exe) before building.
http://www.kinook.com/VisBuildPro/Ma...lphiaction.htm
Try putting double quotes around the .bat filename:
"C:\Program Files (x86)\CodeGear\RAD Studio\5.0\Bin\rsvars.bat"
If that doesn't help, please provide the error information. Thanks.