This problem was seen with Visual Studio 2005 using the GhostPDL v9.04 solution with project language_switch. To reproduce, set the active configuration to Debug, "Clean" the project, and then select "Rebuild All" on the project. bscmake will fail because *.sbr files cannot be found in the debugobj directory. The exact error is BSCMAKE error BK1506 cannot open file '.\debugobj\*.sbr': No such file or directory. To fix, add SBR=1 to the Rebuild All command line in Debug mode.
I believe this is fixed now; certainly I cannot reproduce it with the latest version. Thanks for the report.