Fixes the problem of the debugger becoming very slow when stepping over code while debugging a program. This problem can appear on any version of OS/2 but does so more frequently on OS/2 Version 4.0. You must be at VisualAge C++ FixPak CTU303 or higher for this fix to work. This fix contains the following DLLs: DDE4CR.DLL DDE4CRP.DLL DDE4CX.DLL DDE4DSL.DLL DDE4LDE.DLL DDE4PRT.DLL DDE4PSM.DLL To install, make a backup copy of the DLLs with these names that are already in the \ibmcpp\dll directory. Then copy these new DLLs into the \ibmcpp\dll directory.